[gtk+] window: Remove dead code

[Matthias Clasen <matthiasc src gnome org>]

commit 55df74a1026b61436619fa9dae778b5a1a7f4f27
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Oct 20 14:43:11 2017 +0200

    window: Remove dead code
    
    GtkWindow never has a parent widget, so we never need to create
    a child window for it.

 gtk/gtkwindow.c |   15 ---------------
 1 files changed, 0 insertions(+), 15 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 9ad57c6..64d9304 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -6744,21 +6744,6 @@ gtk_window_realize (GtkWidget *widget)
 
   _gtk_widget_get_allocation (widget, &allocation);
 
-  if (gtk_widget_get_parent_window (widget))
-    {
-      gdk_window = gdk_window_new_child (gtk_widget_get_parent_window (widget),
-                                         GDK_ALL_EVENTS_MASK,
-                                         &allocation);
-      gtk_widget_set_window (widget, gdk_window);
-      gtk_widget_register_window (widget, gdk_window);
-      gtk_widget_set_realized (widget, TRUE);
-
-      priv->renderer = gsk_renderer_new_for_window (gdk_window);
-      gsk_renderer_set_scale_factor (priv->renderer, gtk_widget_get_scale_factor (widget));
-
-      return;
-    }
-
   /* ensure widget tree is properly size allocated */
   if (allocation.x == -1 &&
       allocation.y == -1 &&