org-refile: Restore previous behaviour of not revealing the refiled headline

* lisp/org-refile.el (org-refile): Do not reveal the refiled headline.
This reverts the new behaviour accidentally introduced by org-fold
patchset.

See https://orgmode.org/list/87r15l5kce.fsf@gnu.org

lisp/org-refile.el

@@ -547,7 +547,6 @@ prefix argument (`C-u C-u C-u C-c C-w')."
 		   (goto-char (point-min))
 		   (or (outline-next-heading) (goto-char (point-max)))))
 	       (unless (bolp) (newline))
-               (org-fold-reveal)
 	       (org-paste-subtree level nil nil t)
 	       ;; Record information, according to `org-log-refile'.
 	       ;; Do not prompt for a note when refiling multiple