[gtk+] window: Remove dead code

[Matthias Clasen <matthiasc src gnome org>]

commit b8cc22a5529325520e9fe08990e9f700005b0e40
Author: Timm Bäder <mail baedert org>
Date:   Fri Jun 2 18:24:38 2017 +0200

    window: Remove dead code
    
    This case can never happen since GtkWindow instances never have a
    parent.

 gtk/gtkwindow.c |    6 ------
 1 files changed, 0 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 9f61528..d83c659 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -7997,12 +7997,6 @@ static void
 gtk_window_queue_draw_region (GtkWidget            *widget,
                              const cairo_region_t *region)
 {
-  if (_gtk_widget_get_parent (widget))
-    {
-      GTK_WIDGET_CLASS (gtk_window_parent_class)->queue_draw_region (widget, region);
-      return;
-    }
-
   gtk_debug_updates_add (widget, region);
 
   gdk_window_invalidate_region (_gtk_widget_get_window (widget), region, TRUE);