Remove unused menu items

dotfiles/bmo/menu.ini

     item        = iam:DOCKING     = bmo iam docking
     item        = iam:UNDOCKING   = bmo iam undocking
     item        = iam:ZLEEPING    = xfce4-terminal -T 'iam:ZLEEPING' -e 'bmo iam zleeping'
-    item        = kb:us           = setxkbmap us
-    item        = kb:cz           = setxkbmap cz
     select_args = --split =
     consumer    = bash -