Remove strings already defined upstream

app/javascript/flavours/glitch/locales/en.json

@@ -64,8 +64,6 @@
   "notification_purge.btn_invert": "Invert\nselection",
   "notification_purge.btn_none": "Select\nnone",
   "notification_purge.start": "Enter notification cleaning mode",
-  "notifications.column_settings.filter_bar.advanced": "Display all categories",
-  "notifications.column_settings.filter_bar.category": "Quick filter bar",
   "notifications.column_settings.filter_bar.show_bar": "Show filter bar",
   "notifications.marked_clear": "Clear selected notifications",
   "notifications.marked_clear_confirmation": "Are you sure you want to permanently clear all selected notifications?",