[gtk] notebook: Avoid a crash

[Matthias Clasen <matthiasc src gnome org>]

commit acb7f437fa759e1d95b45b07830a1ed99fd9d244
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Oct 12 19:00:35 2019 -0400

    notebook: Avoid a crash
    
    This is fallout from turning the menu into
    a popover, causing it to be be a child.

 gtk/gtknotebook.c | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index 2082a1038a..3c1509317f 100644
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -1858,9 +1858,6 @@ gtk_notebook_destroy (GtkWidget *widget)
   if (priv->pages)
     g_list_model_items_changed (G_LIST_MODEL (priv->pages), 0, g_list_length (priv->children), 0);
 
-  if (priv->menu)
-    gtk_notebook_popup_disable (notebook);
-
   if (priv->source_targets)
     {
       gdk_content_formats_unref (priv->source_targets);