[mutter/tintou/clutter-grab-nullable] clutter/stage: Remove unused nullable annotation

[Corentin Noël <corentinnoel src gnome org>]

commit 12c01d3c480aca5fa92f5791c44c400404ebdfc6
Author: Corentin Noël <corentin noel collabora com>
Date:   Fri Apr 22 08:47:05 2022 +0200

    clutter/stage: Remove unused nullable annotation
    
    This annotation wasn't taken into account because of the colon, but shouldn't
    be applied as there is no way a NULL ClutterGrab can be returned.

 clutter/clutter/clutter-stage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/clutter/clutter/clutter-stage.c b/clutter/clutter/clutter-stage.c
index 5cd09a2c44..428efc8754 100644
--- a/clutter/clutter/clutter-stage.c
+++ b/clutter/clutter/clutter-stage.c
@@ -3779,7 +3779,7 @@ G_DEFINE_BOXED_TYPE (ClutterGrab, clutter_grab,
  * Grabs input onto a certain actor. Events will be propagated as
  * usual inside its hierarchy.
  *
- * Returns: (transfer full): (nullable): an opaque #ClutterGrab handle, drop
+ * Returns: (transfer full): an opaque #ClutterGrab handle, drop
  *   with clutter_grab_dismiss()
  **/
 ClutterGrab *