docs: Remove vfunc that doesn't exist anymore

diff --git a/gtk/gtkwidget.h b/gtk/gtkwidget.h
index e3adad3d1c7b1974f8de583448e62e1d29a4a751..f81b4eb0036d5a536d212e11de82ad48fbc7c506 100644 (file)
--- a/gtk/gtkwidget.h
+++ b/gtk/gtkwidget.h
@@ -237,8 +237,6 @@ struct _GtkWidget
  * @selection_notify_event:
  * @proximity_in_event:
  * @proximity_out_event:
- * @visibility_notify_event: Signal emitted when the widget’s window is
- *   obscured or unobscured.
  * @window_state_event: Signal emitted when the state of the toplevel
  *   window associated to the widget changes.
  * @grab_broken_event: Signal emitted when a pointer or keyboard grab