[gtk] Fix a crash in action muxer destruction

[Matthias Clasen <matthiasc src gnome org>]

commit 3b6ee32f83882c8c2c736c7bb504a47bf1fdf407
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jun 30 18:35:28 2019 +0000

    Fix a crash in action muxer destruction
    
    I've seen a crash when the action muxer gets
    disposed during widget destroy, and tries to
    disconnect from widget signals too late.
    
    There is no real need to disconnect, since the
    only time an action muxer is going away is when
    its widget is destroyed, so just don't do it.

 gtk/gtkactionmuxer.c | 9 ---------
 1 file changed, 9 deletions(-)
---
diff --git a/gtk/gtkactionmuxer.c b/gtk/gtkactionmuxer.c
index 23c4f56a5a..6b4fb9a654 100644
--- a/gtk/gtkactionmuxer.c
+++ b/gtk/gtkactionmuxer.c
@@ -561,13 +561,6 @@ prop_actions_connect (GtkActionMuxer *muxer)
     }
 }
 
-static void
-prop_actions_disconnect (GtkActionMuxer *muxer)
-{
-  if (muxer->widget)
-    g_signal_handlers_disconnect_by_func (muxer->widget,
-                                          prop_action_notify, muxer);
-}
 
 static gboolean
 gtk_action_muxer_query_action (GActionGroup        *action_group,
@@ -819,8 +812,6 @@ gtk_action_muxer_dispose (GObject *object)
 {
   GtkActionMuxer *muxer = GTK_ACTION_MUXER (object);
 
-  prop_actions_disconnect (muxer);
-
   if (muxer->parent)
   {
     g_signal_handlers_disconnect_by_func (muxer->parent, gtk_action_muxer_action_added_to_parent, muxer);