org: Dropped one non-functional keybinding

lisp/org.el

@@ -18984,7 +18984,6 @@ COMMANDS is a list of alternating OLDDEF NEWDEF command names."
 
 ;;;; All the other keys
 (org-defkey org-mode-map (kbd "|") #'org-force-self-insert)
-(org-defkey org-mode-map (kbd "C-c C-a") #'org-show-all)
 (org-defkey org-mode-map (kbd "C-c C-r") #'org-reveal)
 (org-defkey org-mode-map (kbd "C-M-t") #'org-transpose-element)
 (org-defkey org-mode-map (kbd "M-}") #'org-forward-element)