contact_list_store_update_list_mode_foreach: remove useless show_protocol variable
contact_list_store_update_list_mode_foreach: remove useless show_protocol variable

GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets