efaq: Deleting menus and menu options

 
 5.43 How do I delete menus and menu options?
 ============================================
 
 The simplest way to remove a menu is to set its keymap to ‘nil’.  For
 example, to delete the ‘Words’ menu (SeeModifying pull-down menus),
 use:
 
      (define-key global-map [menu-bar words] nil)
 
    Similarly, removing a menu option requires redefining a keymap entry
 to ‘nil’.  For example, to delete the ‘Forward word’ menu option from
 the ‘Edit’ menu (we added it in SeeModifying pull-down menus), use:
 
      (define-key global-map [menu-bar edit forward] nil)