Revert "Fix bug#79518 with 'windmove-mode' in "C-h m" display"

This reverts commit bf750adc4e.
It caused windmove to be loaded unconditionally.
The correct "fix" for bug#79518 is to load the package or
to toggle the mode.

lisp/windmove.el

@@ -520,10 +520,8 @@ stopped because it wouldn't move into a window marked with
 (define-minor-mode windmove-mode
   "Global minor mode for default windmove commands."
   :keymap windmove-mode-map
-  :initialize 'custom-initialize-delay
   :init-value t
-  :global t
-  :group 'windows)
+  :global t)
 
 (defun windmove-install-defaults (prefix modifiers alist &optional uninstall)
   "Install keys as specified by ALIST.