clutter: Drop _clutter_clear_events_queue_for_stage()

There's only one stage. Let's not overcomplicate things, as it
will not be possible to simply go through the event queue inspecting
every event.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1448

clutter/clutter/clutter-event-private.h

@@ -18,7 +18,6 @@ gboolean        _clutter_event_process_filters          (ClutterEvent       *eve
 
 /* clears the event queue inside the main context */
 void            _clutter_clear_events_queue             (void);
-void            _clutter_clear_events_queue_for_stage   (ClutterStage       *stage);
 
 CLUTTER_EXPORT
 void            _clutter_event_set_platform_data        (ClutterEvent       *event,

clutter/clutter/clutter-main.c

@@ -2327,30 +2327,6 @@ _clutter_clear_events_queue (void)
     }
 }
 
-void
-_clutter_clear_events_queue_for_stage (ClutterStage *stage)
-{
-  ClutterMainContext *context = _clutter_context_get_default ();
-  GList *l, *next;
-
-  if (context->events_queue == NULL)
-    return;
-
-  /* Remove any pending events for this stage from the event queue */
-  for (l = context->events_queue->head; l; l = next)
-    {
-      ClutterEvent *event = l->data;
-
-      next = l->next;
-
-      if (event->any.stage == stage)
-        {
-          g_queue_delete_link (context->events_queue, l);
-          clutter_event_free (event);
-        }
-    }
-}
-
 ClutterPickMode
 _clutter_context_get_pick_mode (void)
 {

clutter/clutter/clutter-stage.c

@@ -1680,7 +1680,7 @@ clutter_stage_dispose (GObject *object)
 
   clutter_actor_hide (CLUTTER_ACTOR (object));
 
-  _clutter_clear_events_queue_for_stage (stage);
+  _clutter_clear_events_queue ();
 
   if (priv->impl != NULL)
     {