menu: Disable support for "deck" and "card" menu items

Disable support for customizing the main lcd display content via the
menu system.  Advise users to use the new display_data config sections
as a replacement.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/extras/display/menu.py

@@ -957,8 +957,8 @@ menu_items = {
     'input': MenuInput,
     'list': MenuList,
     'vsdcard': MenuVSDCard,
-    'deck': MenuDeck,
-    'card': MenuCard
+    #'deck': MenuDeck,
+    #'card': MenuCard
 }
 
 MENU_UPDATE_DELAY = .100