[mutter] clutter: Remove clutter_stage_skip_sync_delay declaration

[Marge Bot <marge-bot src gnome org>]

commit f97d2c5f670cb7beb4d9987a02bc65fd9a60702b
Author: Ivan Molodetskikh <yalterz gmail com>
Date:   Tue Nov 24 21:41:38 2020 +0300

    clutter: Remove clutter_stage_skip_sync_delay declaration
    
    It wasn't defined or used anywhere.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1707>

 clutter/clutter/clutter-stage.h | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/clutter/clutter/clutter-stage.h b/clutter/clutter/clutter-stage.h
index a3b72b46c2..be588a5f34 100644
--- a/clutter/clutter/clutter-stage.h
+++ b/clutter/clutter/clutter-stage.h
@@ -199,9 +199,6 @@ gboolean        clutter_stage_is_redraw_queued_on_view          (ClutterStage
 #ifdef CLUTTER_ENABLE_EXPERIMENTAL_API
 CLUTTER_EXPORT
 void            clutter_stage_set_sync_delay                    (ClutterStage          *stage,
-                                                                 gint                   sync_delay);
-CLUTTER_EXPORT
-void            clutter_stage_skip_sync_delay                   (ClutterStage          *stage);
 #endif
 
 CLUTTER_EXPORT