[mutter] clutter/eglnative: Remove unused source field

[Jonas Ådahl <jadahl src gnome org>]

commit ebfa94f3605fef43ff74ac75647c7897d52f63cf
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Jul 9 21:21:08 2020 +0200

    clutter/eglnative: Remove unused source field
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1364

 clutter/clutter/egl/clutter-backend-eglnative.h | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/clutter/clutter/egl/clutter-backend-eglnative.h b/clutter/clutter/egl/clutter-backend-eglnative.h
index 3a884c4cd4..8c49aa4d75 100644
--- a/clutter/clutter/egl/clutter-backend-eglnative.h
+++ b/clutter/clutter/egl/clutter-backend-eglnative.h
@@ -52,9 +52,6 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC (ClutterBackendEglNative, g_object_unref)
 struct _ClutterBackendEglNative
 {
   ClutterBackend parent_instance;
-
-  /* event source */
-  GSource *event_source;
 };
 
 struct _ClutterBackendEglNativeClass