diff --git a/lisp/ob-core.el b/lisp/ob-core.el
index 57f37c6f2..88b7acba4 100644
--- a/lisp/ob-core.el
+++ b/lisp/ob-core.el
@@ -2441,10 +2441,6 @@ file's directory then expand relative links."
 (defvar org-babel-capitalize-example-region-markers nil
   "Make true to capitalize begin/end example markers inserted by code blocks.")
 
-(define-obsolete-function-alias
-  'org-babel-examplize-region
-  'org-babel-examplify-region "25.1")
-
 (defun org-babel-examplify-region (beg end &optional results-switches inline)
   "Comment out region using the inline `==' or `: ' org example quote."
   (interactive "*r")
@@ -2913,8 +2909,6 @@ can be specified as the REGEXP argument."
       (setq string (substring string 0 -1)))
     string))
 
-(define-obsolete-function-alias 'org-babel-trim 'org-trim "Org 9.0")
-
 (defun org-babel-local-file-name (file)
   "Return the local name component of FILE."
   (or (file-remote-p file 'localname) file))
diff --git a/lisp/org-agenda.el b/lisp/org-agenda.el
index 37b8b12cd..b47f8b6cb 100644
--- a/lisp/org-agenda.el
+++ b/lisp/org-agenda.el
@@ -998,8 +998,6 @@ you want to use two-columns display (see `org-agenda-menu-two-columns')."
   :version "24.1"
   :type 'boolean)
 
-(define-obsolete-variable-alias 'org-agenda-menu-two-column 'org-agenda-menu-two-columns "24.3")
-
 (defcustom org-agenda-menu-two-columns nil
   "Non-nil means, use two columns to show custom commands in the dispatcher.
 If you use this, you probably want to set `org-agenda-menu-show-matcher'
@@ -1008,7 +1006,6 @@ to nil."
   :version "24.1"
   :type 'boolean)
 
-(define-obsolete-variable-alias 'org-finalize-agenda-hook 'org-agenda-finalize-hook "24.3")
 (defcustom org-agenda-finalize-hook nil
   "Hook run just before displaying an agenda buffer.
 The buffer is still writable when the hook is called.
@@ -1125,16 +1122,6 @@ option will be ignored."
   :group 'org-agenda-windows
   :type 'boolean)
 
-(defcustom org-agenda-ndays nil
-  "Number of days to include in overview display.
-Should be 1 or 7.
-Obsolete, see `org-agenda-span'."
-  :group 'org-agenda-daily/weekly
-  :type '(choice (const nil)
-		 (integer)))
-
-(make-obsolete-variable 'org-agenda-ndays 'org-agenda-span "24.1")
-
 (defcustom org-agenda-span 'week
   "Number of days to include in overview display.
 Can be day, week, month, year, or any number of days.
@@ -4221,8 +4208,7 @@ items if they have an hour specification like [h]h:mm."
 	(setq start-day (time-to-days (org-read-date nil t start-day))))
     (org-compile-prefix-format 'agenda)
     (org-set-sorting-strategy 'agenda)
-    (let* ((span (org-agenda-ndays-to-span
-		  (or span org-agenda-ndays org-agenda-span)))
+    (let* ((span (org-agenda-ndays-to-span (or span org-agenda-span)))
 	   (today (org-today))
 	   (sd (or start-day today))
 	   (ndays (org-agenda-span-to-ndays span sd))
@@ -7851,7 +7837,7 @@ Negative selection means regexp must not match for selection of an entry."
      (tdpos (goto-char tdpos))
      ((eq org-agenda-type 'agenda)
       (let* ((sd (org-agenda-compute-starting-span
-		  (org-today) (or curspan org-agenda-ndays org-agenda-span)))
+		  (org-today) (or curspan org-agenda-span)))
 	     (org-agenda-overriding-arguments args))
 	(setf (nth 1 org-agenda-overriding-arguments) sd)
 	(org-agenda-redo)
@@ -7980,7 +7966,7 @@ With prefix ARG, go backward that many times the current span."
 (defun org-agenda-reset-view ()
   "Switch to default view for agenda."
   (interactive)
-  (org-agenda-change-time-span (or org-agenda-ndays org-agenda-span)))
+  (org-agenda-change-time-span org-agenda-span))
 (defun org-agenda-day-view (&optional day-of-month)
   "Switch to daily view for agenda.
 With argument DAY-OF-MONTH, switch to that day of the month."
@@ -8324,9 +8310,6 @@ When called with a prefix argument, include all archive files as well."
 	      (if org-agenda-clockreport-mode " Clock" "")))
   (force-mode-line-update))
 
-(define-obsolete-function-alias
-  'org-agenda-post-command-hook 'org-agenda-update-agenda-type "24.3")
-
 (defun org-agenda-update-agenda-type ()
   "Update the agenda type after each command."
   (setq org-agenda-type
@@ -10182,7 +10165,6 @@ days as returned by `calendar-absolute-from-gregorian' or
 when defining today."
   (eq (org-today)
       (if (consp date) (calendar-absolute-from-gregorian date) date)))
-(define-obsolete-function-alias 'org-agenda-todayp 'org-agenda-today-p "25.1")
 
 (defun org-agenda-todo-yesterday (&optional arg)
   "Like `org-agenda-todo' but the time of change will be 23:59 of yesterday."
diff --git a/lisp/org-clock.el b/lisp/org-clock.el
index dce7edfe0..53dc0a214 100644
--- a/lisp/org-clock.el
+++ b/lisp/org-clock.el
@@ -237,9 +237,6 @@ file name  Play this sound file, fall back to beep"
 	  (const :tag "Standard beep" t)
 	  (file  :tag "Play sound file")))
 
-(define-obsolete-variable-alias 'org-clock-modeline-total
-  'org-clock-mode-line-total "24.3")
-
 (defcustom org-clock-mode-line-total 'auto
   "Default setting for the time included for the mode line clock.
 This can be overruled locally using the CLOCK_MODELINE_TOTAL property.
diff --git a/lisp/org-colview.el b/lisp/org-colview.el
index d26f16a36..a856a240c 100644
--- a/lisp/org-colview.el
+++ b/lisp/org-colview.el
@@ -1497,9 +1497,6 @@ PARAMS is a property list of parameters:
 		     (id)))))
   (org-update-dblock))
 
-(define-obsolete-function-alias 'org-insert-columns-dblock
-  'org-columns-insert-dblock "Org 9.0")
-
 
 
 ;;; Column view in the agenda
diff --git a/lisp/org-compat.el b/lisp/org-compat.el
index 85a02c696..70a293223 100644
--- a/lisp/org-compat.el
+++ b/lisp/org-compat.el
@@ -52,11 +52,10 @@
     (defalias 'gui-get-selection 'x-get-selection)))
 
 
-;;; Obsolete aliases (remove them the next major release).
-
-(define-obsolete-function-alias 'org-activate-mark 'activate-mark)
+;;; Obsolete aliases (remove them once the next major release is released).
 
 ;;;; XEmacs compatibility, now removed.
+(define-obsolete-function-alias 'org-activate-mark 'activate-mark)
 (define-obsolete-function-alias 'org-add-hook 'add-hook "Org 9.0")
 (define-obsolete-function-alias 'org-bound-and-true-p 'bound-and-true-p "Org 9.0")
 (define-obsolete-function-alias 'org-decompose-region 'decompose-region "Org 9.0")
@@ -99,11 +98,96 @@
 (define-obsolete-function-alias 'org-pop-to-buffer-same-window 'pop-to-buffer-same-window "Org 9.0")
 (define-obsolete-function-alias 'org-string-match-p 'string-match-p "Org 9.0")
 
-;;;; Variables declared obsolete.
+;;;; Functions and variables from previous releases now obsolete.
+(define-obsolete-function-alias 'org-element-remove-indentation
+  'org-remove-indentation "Org 9.0")
 (define-obsolete-variable-alias 'org-hierarchical-checkbox-statistics
   'org-checkbox-hierarchical-statistics "Org 8.0")
 (define-obsolete-variable-alias 'org-description-max-indent
   'org-list-description-max-indent "Org 8.0")
+(define-obsolete-variable-alias 'org-latex-create-formula-image-program
+  'org-preview-latex-default-process "Org 9.0")
+(define-obsolete-variable-alias 'org-latex-preview-ltxpng-directory
+ 'org-preview-latex-image-directory "Org 9.0")
+(define-obsolete-function-alias 'org-table-p 'org-at-table-p "Org 9.0")
+(define-obsolete-function-alias 'org-on-heading-p 'org-at-heading-p "Org 9.0")
+(define-obsolete-function-alias 'org-at-regexp-p 'org-in-regexp "Org 8.3")
+(define-obsolete-function-alias 'org-speed-command-default-hook
+  'org-speed-command-activate "Org 8.0")
+(define-obsolete-function-alias 'org-babel-speed-command-hook
+  'org-babel-speed-command-activate "Org 8.0")
+(define-obsolete-function-alias 'org-image-file-name-regexp
+  'image-file-name-regexp "Org 9.0")
+(define-obsolete-function-alias 'org-get-legal-level
+  'org-get-valid-level "Org 7.8")
+(define-obsolete-function-alias 'org-completing-read-no-i
+  'completing-read "Org 9.0")
+(define-obsolete-function-alias 'org-icompleting-read
+  'completing-read "Org 9.0")
+(define-obsolete-function-alias 'org-iread-file-name 'read-file-name "Org 9.0")
+(define-obsolete-function-alias 'org-days-to-time
+  'org-time-stamp-to-now "Org 8.2")
+(define-obsolete-variable-alias 'org-agenda-ignore-drawer-properties
+  'org-agenda-ignore-properties "Org 9.0")
+(define-obsolete-function-alias 'org-preview-latex-fragment
+  'org-toggle-latex-fragment "Org 8.3")
+(define-obsolete-function-alias 'org-display-inline-modification-hook
+  'org-display-inline-remove-overlay "Org 8.0")
+(define-obsolete-function-alias 'org-export-get-genealogy
+  'org-element-lineage "Org 9.0")
+(define-obsolete-variable-alias 'org-latex-with-hyperref
+  'org-latex-hyperref-template "Org 9.0")
+(define-obsolete-variable-alias 'org-link-to-org-use-id
+  'org-id-link-to-org-use-id "Org 8.0")
+(define-obsolete-variable-alias 'hfy-optimisations 'hfy-optimizations "Org 9.0")
+(define-obsolete-variable-alias 'org-clock-modeline-total
+  'org-clock-mode-line-total "Org 8.0")
+(define-obsolete-function-alias 'org-protocol-unhex-compound
+  'org-link-unescape-compound "Org 7.8")
+(define-obsolete-function-alias 'org-protocol-unhex-string
+  'org-link-unescape "Org 7.8")
+(define-obsolete-function-alias 'org-protocol-unhex-single-byte-sequence
+  'org-link-unescape-single-byte-sequence "Org 7.8")
+(define-obsolete-variable-alias 'org-export-htmlized-org-css-url
+  'org-org-htmlized-css-url "Org 8.2")
+(define-obsolete-variable-alias 'org-alphabetical-lists
+  'org-list-allow-alphabetical "Org 8.0")
+(define-obsolete-function-alias 'org-list-parse-list 'org-list-to-lisp "Org 9.0")
+(define-obsolete-variable-alias 'org-agenda-menu-two-column
+  'org-agenda-menu-two-columns "Org 8.0")
+(define-obsolete-variable-alias 'org-finalize-agenda-hook
+  'org-agenda-finalize-hook "Org 8.0")
+(make-obsolete-variable 'org-agenda-ndays 'org-agenda-span "Org 7.8")
+(define-obsolete-function-alias 'org-agenda-post-command-hook
+  'org-agenda-update-agenda-type "Org 8.0")
+(define-obsolete-function-alias 'org-agenda-todayp
+  'org-agenda-today-p "Org 9.0")
+(define-obsolete-function-alias 'org-babel-examplize-region
+  'org-babel-examplify-region "Org 9.0")
+(define-obsolete-function-alias 'org-babel-trim 'org-trim "Org 9.0")
+(define-obsolete-variable-alias 'org-html-style-include-scripts
+  'org-html-head-include-scripts "Org 8.0")
+(define-obsolete-variable-alias 'org-html-style-include-default
+  'org-html-head-include-default-style "Org 8.0")
+(define-obsolete-variable-alias 'org-html-style 'org-html-head "24.4")
+(define-obsolete-function-alias 'org-insert-columns-dblock
+  'org-columns-insert-dblock "Org 9.0")
+
+(make-obsolete-variable
+ 'org-read-date-minibuffer-setup-hook
+ "Set `org-read-date-minibuffer-local-map' instead." "24.4")
+(defcustom org-read-date-minibuffer-setup-hook nil
+  "Hook to be used to set up keys for the date/time interface.
+Add key definitions to `minibuffer-local-map', which will be a
+temporary copy.
+
+WARNING: This option is obsolete, you should use
+`org-read-date-minibuffer-local-map' to set up keys."
+  :group 'org-time
+  :type 'hook)
+
+
+;;; Miscellaneous functions
 
 (defun org-compatible-face (inherits specs)
   "Make a compatible face specification.
@@ -139,9 +223,6 @@ is, use SPECS to define the face."
 	    t))
       t)))
 
-
-;;; Miscellaneous functions
-
 (defun org-get-x-clipboard (value)
   "Get the value of the X or Windows clipboard."
   (cond ((eq window-system 'x)
diff --git a/lisp/org-element.el b/lisp/org-element.el
index 7c57b35ba..269bc7d80 100644
--- a/lisp/org-element.el
+++ b/lisp/org-element.el
@@ -6041,10 +6041,6 @@ end of ELEM-A."
 	  (move-overlay (car o) (- (nth 1 o) offset) (- (nth 2 o) offset))))
       (goto-char (org-element-property :end elem-B)))))
 
-;; For backward-compatibility with Org <= 8.3
-(define-obsolete-function-alias
-  'org-element-remove-indentation 'org-remove-indentation "25.1")
-
 
 (provide 'org-element)
 
diff --git a/lisp/org-id.el b/lisp/org-id.el
index 1a5b07093..2646c80b3 100644
--- a/lisp/org-id.el
+++ b/lisp/org-id.el
@@ -81,8 +81,6 @@
   :tag "Org ID"
   :group 'org)
 
-(define-obsolete-variable-alias
-  'org-link-to-org-use-id 'org-id-link-to-org-use-id "24.3")
 (defcustom org-id-link-to-org-use-id nil
   "Non-nil means storing a link to an Org file will use entry IDs.
 \\<org-mode-map>\
diff --git a/lisp/org-list.el b/lisp/org-list.el
index fbc53aa83..129d554aa 100644
--- a/lisp/org-list.el
+++ b/lisp/org-list.el
@@ -244,8 +244,6 @@ interface or run the following code after updating it:
   :set (lambda (var val) (set var val)
 	 (when (featurep 'org-element) (org-element-update-syntax))))
 
-(define-obsolete-variable-alias 'org-alphabetical-lists
-  'org-list-allow-alphabetical "24.4") ; Since 8.0
 (defcustom org-list-allow-alphabetical nil
   "Non-nil means single character alphabetical bullets are allowed.
 
@@ -3022,8 +3020,6 @@ Point is left at list's end."
 	(delete-region top bottom)
 	(when (and (not (looking-at "[ \t]*$")) (looking-at org-list-end-re))
 	  (replace-match ""))))))
-(define-obsolete-function-alias
-  'org-list-parse-list 'org-list-to-lisp "Org 9.0")
 
 (defun org-list-make-subtree ()
   "Convert the plain list at point into a subtree."
diff --git a/lisp/org-protocol.el b/lisp/org-protocol.el
index aa3b4da24..8fabc3ad2 100644
--- a/lisp/org-protocol.el
+++ b/lisp/org-protocol.el
@@ -121,19 +121,6 @@
 		  (filename &optional up))
 (declare-function server-edit "server" (&optional arg))
 
-(define-obsolete-function-alias
-  'org-protocol-unhex-compound 'org-link-unescape-compound
-  "2011-02-17")
-
-(define-obsolete-function-alias
-  'org-protocol-unhex-string 'org-link-unescape
-  "2011-02-17")
-
-(define-obsolete-function-alias
-  'org-protocol-unhex-single-byte-sequence
-  'org-link-unescape-single-byte-sequence
-  "2011-02-17")
-
 (defvar org-capture-link-is-already-stored)
 
 (defgroup org-protocol nil
diff --git a/lisp/org.el b/lisp/org.el
index e13e82d4a..89b72bc03 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -3388,19 +3388,6 @@ When nil, only the minibuffer will be available."
 (defvaralias 'org-popup-calendar-for-date-prompt
   'org-read-date-popup-calendar)
 
-(make-obsolete-variable
- 'org-read-date-minibuffer-setup-hook
- "Set `org-read-date-minibuffer-local-map' instead." "24.4")
-(defcustom org-read-date-minibuffer-setup-hook nil
-  "Hook to be used to set up keys for the date/time interface.
-Add key definitions to `minibuffer-local-map', which will be a
-temporary copy.
-
-WARNING: This option is obsolete, you should use
-`org-read-date-minibuffer-local-map' to set up keys."
-  :group 'org-time
-  :type 'hook)
-
 (defcustom org-extend-today-until 0
   "The hour when your day really ends.  Must be an integer.
 This has influence for the following applications:
@@ -3981,10 +3968,6 @@ When using LaTeXML set this option to
 	  (const :tag "None" nil)
 	  (string :tag "\nShell command")))
 
-(define-obsolete-variable-alias
-  'org-latex-create-formula-image-program
-  'org-preview-latex-default-process "25.1")
-
 (defcustom org-preview-latex-default-process 'dvipng
   "The default process to convert LaTeX fragments to image files.
 All available processes and theirs documents can be found in
@@ -4085,10 +4068,6 @@ Place-holders only used by `:image-converter':
   :type '(alist :tag "LaTeX to image backends"
 		:value-type (plist)))
 
-(define-obsolete-variable-alias
- 'org-latex-preview-ltxpng-directory
- 'org-preview-latex-image-directory "25.1")
-
 (defcustom org-preview-latex-image-directory "ltximg/"
   "Path to store latex preview images.
 A relative path here creates many directories relative to the
@@ -4567,7 +4546,6 @@ If `org-enable-table-editor' is nil, return nil unconditionally."
    (or (not (derived-mode-p 'org-mode))
        (let ((e (org-element-lineage (org-element-at-point) '(table) t)))
 	 (and e (or table-type (eq (org-element-property :type e) 'org)))))))
-(define-obsolete-function-alias 'org-table-p 'org-at-table-p "Org 9.0")
 
 (defun org-at-table.el-p ()
   "Non-nil when point is at a table.el table."
@@ -8185,7 +8163,6 @@ even level numbers will become the next higher odd number."
 	    ((> change 0) (1+ (* 2 (/ (+ level (* 2 change)) 2))))
 	    ((< change 0) (max 1 (1+ (* 2 (/ (+ level (* 2 change)) 2))))))
     (max 1 (+ level (or change 0)))))
-(define-obsolete-function-alias 'org-get-legal-level 'org-get-valid-level "23.1")
 
 (defun org-promote ()
   "Promote the current heading higher up the tree."
@@ -10519,13 +10496,6 @@ Use TAB to complete link prefixes, then RET for type-specific completion support
 		'org-time-stamp-inactive)
     (apply #'completing-read args)))
 
-(define-obsolete-function-alias
-  'org-completing-read-no-i 'completing-read "Org 9.0")
-(define-obsolete-function-alias
-  'org-icompleting-read 'completing-read "Org 9.0")
-(define-obsolete-function-alias
-  'org-iread-file-name 'read-file-name "Org 9.0")
-
 ;;; Opening/following a link
 
 (defvar org-link-search-failed nil)
@@ -17460,8 +17430,6 @@ Don't touch the rest."
   (let ((n 0))
     (mapcar (lambda (x) (if (< (setq n (1+ n)) 7) (or x 0) x)) time)))
 
-(define-obsolete-function-alias 'org-days-to-time 'org-time-stamp-to-now "24.4")
-
 (defun org-time-stamp-to-now (timestamp-string &optional seconds)
   "Difference between TIMESTAMP-STRING and now in days.
 If SECONDS is non-nil, return the difference in seconds."
@@ -18439,10 +18407,6 @@ tables are not re-aligned, etc."
   :version "24.3"
   :group 'org-agenda)
 
-(define-obsolete-variable-alias
-  'org-agenda-ignore-drawer-properties
-  'org-agenda-ignore-properties "25.1")
-
 (defcustom org-agenda-ignore-properties nil
   "Avoid updating text properties when building the agenda.
 Properties are used to prepare buffers for effort estimates,
@@ -19079,8 +19043,6 @@ overlays were removed, nil otherwise."
     (mapc #'delete-overlay overlays)
     overlays))
 
-(define-obsolete-function-alias
-  'org-preview-latex-fragment 'org-toggle-latex-fragment "24.4")
 (defun org-toggle-latex-fragment (&optional arg)
   "Preview the LaTeX fragment at point, or all locally or globally.
 
@@ -19722,9 +19684,6 @@ boundaries."
 			    (list 'org-display-inline-remove-overlay))
 			   (push ov org-inline-image-overlays)))))))))))))))
 
-(define-obsolete-function-alias
-  'org-display-inline-modification-hook 'org-display-inline-remove-overlay "24.3")
-
 (defun org-display-inline-remove-overlay (ov after _beg _end &optional _len)
   "Remove inline-display overlay if a corresponding region is modified."
   (let ((inhibit-modification-hooks t))
@@ -20113,9 +20072,6 @@ If not, return to the original position and throw an error."
 (defvar org-table-auto-blank-field) ; defined in org-table.el
 (defvar org-speed-command nil)
 
-(define-obsolete-function-alias
-  'org-speed-command-default-hook 'org-speed-command-activate "24.3")
-
 (defun org-speed-command-activate (keys)
   "Hook for activating single-letter speed commands.
 `org-speed-commands-default' specifies a minimal command set.
@@ -20126,9 +20082,6 @@ Use `org-speed-commands-user' for further customization."
     (cdr (assoc keys (append org-speed-commands-user
 			     org-speed-commands-default)))))
 
-(define-obsolete-function-alias
-  'org-babel-speed-command-hook 'org-babel-speed-command-activate "24.3")
-
 (defun org-babel-speed-command-activate (keys)
   "Hook for activating single-letter code block commands."
   (when (and (bolp) (looking-at org-babel-src-block-regexp))
@@ -22556,8 +22509,6 @@ match."
 	  (let ((end (match-end 0)))
 	    (when (or (> end pos) (and (= end pos) (not visually)))
 	      (throw :exit (cons (match-beginning 0) (match-end 0))))))))))
-(define-obsolete-function-alias 'org-at-regexp-p 'org-in-regexp
-  "Org mode 8.3")
 
 (defun org-between-regexps-p (start-re end-re &optional lim-up lim-down)
   "Non-nil when point is between matches of START-RE and END-RE.
@@ -22775,9 +22726,6 @@ not an indirect buffer."
 	(or (buffer-base-buffer buf) buf)
       nil)))
 
-(define-obsolete-function-alias 'org-image-file-name-regexp 'image-file-name-regexp
-  "Org 9.0")
-
 ;;; TODO: Only called once, from ox-odt which should probably use
 ;;; org-export-inline-image-p or something.
 (defun org-file-image-p (file)
@@ -24195,10 +24143,6 @@ This version does not only check the character property, but also
 
 (defun org-at-heading-p (&optional ignored)
   (outline-on-heading-p t))
-;;; Though the function was obsoleted in 7.8.03, the byte-compiler
-;;; warning was only added in Org 9.0, which should be taken into
-;;; account when deciding when to remove the alias.
-(define-obsolete-function-alias 'org-on-heading-p 'org-at-heading-p "Org 7.8.03")
 
 (defun org-in-commented-heading-p (&optional no-inheritance)
   "Non-nil if point is under a commented heading.
diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index a7619ef3c..a3fdd6377 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -1416,8 +1416,6 @@ ignored."
 
 ;;;; Template :: Scripts
 
-(define-obsolete-variable-alias
-  'org-html-style-include-scripts 'org-html-head-include-scripts "24.4")
 (defcustom org-html-head-include-scripts t
   "Non-nil means include the JavaScript snippets in exported HTML files.
 The actual script is defined in `org-html-scripts' and should
@@ -1429,8 +1427,6 @@ not be modified."
 
 ;;;; Template :: Styles
 
-(define-obsolete-variable-alias
-  'org-html-style-include-default 'org-html-head-include-default-style "24.4")
 (defcustom org-html-head-include-default-style t
   "Non-nil means include the default style in exported HTML files.
 The actual style is defined in `org-html-style-default' and
@@ -1443,7 +1439,6 @@ style information."
 ;;;###autoload
 (put 'org-html-head-include-default-style 'safe-local-variable 'booleanp)
 
-(define-obsolete-variable-alias 'org-html-style 'org-html-head "24.4")
 (defcustom org-html-head ""
   "Org-wide head definitions for exported HTML files.
 
diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index 213056ce9..090172693 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -621,8 +621,6 @@ precedence over this variable."
   :package-version '(Org . "8.3")
   :type '(choice (const :tag "No template" nil)
 		 (string :tag "Format string")))
-(define-obsolete-variable-alias
-  'org-latex-with-hyperref 'org-latex-hyperref-template "25.1")
 
 ;;;; Headline
 
diff --git a/lisp/ox-odt.el b/lisp/ox-odt.el
index 0bb1dfd6d..29a0b8573 100644
--- a/lisp/ox-odt.el
+++ b/lisp/ox-odt.el
@@ -281,7 +281,6 @@ except that the foreground and background colors are set
 according to the default face identified by the `htmlfontify'.")
 
 (defvar hfy-optimizations)
-(define-obsolete-variable-alias 'hfy-optimisations 'hfy-optimizations "25.1")
 (defvar org-odt-embedded-formulas-count 0)
 (defvar org-odt-embedded-images-count 0)
 (defvar org-odt-image-size-probe-method
diff --git a/lisp/ox-org.el b/lisp/ox-org.el
index 634ebf9ad..b8cd15da4 100644
--- a/lisp/ox-org.el
+++ b/lisp/ox-org.el
@@ -35,8 +35,6 @@
   :version "24.4"
   :package-version '(Org . "8.0"))
 
-(define-obsolete-variable-alias
-  'org-export-htmlized-org-css-url 'org-org-htmlized-css-url "24.4")
 (defcustom org-org-htmlized-css-url nil
   "URL pointing to the CSS defining colors for htmlized Emacs buffers.
 Normally when creating an htmlized version of an Org buffer,
diff --git a/lisp/ox.el b/lisp/ox.el
index 0eb97f1de..da985f3f8 100644
--- a/lisp/ox.el
+++ b/lisp/ox.el
@@ -5442,9 +5442,6 @@ Return the new string."
 
 ;; defsubst org-export-get-parent must be defined before first use
 
-(define-obsolete-function-alias
-  'org-export-get-genealogy 'org-element-lineage "25.1")
-
 (defun org-export-get-parent-headline (blob)
   "Return BLOB parent headline or nil.
 BLOB is the element or object being considered."