Emacs old keybinding syntax before emacs 29 (2023)

Set a keybinding

;; emacs 28 syntax
(global-set-key (kbd "C-t") #'backward-char)

Remove a Keybinding

;; before emacs 28 or before
(global-set-key (kbd "C-t") nil)
;; or
(global-unset-key (kbd "C-t"))

• Emacs Keys: new keybinding functions (emacs 29. 2023)