[gtk+] Drop an unused typedef

[Matthias Clasen <matthiasc src gnome org>]

commit 394c21da9808662ab5ddf53a97b933194af96e95
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jul 19 23:01:18 2017 -0400

    Drop an unused typedef
    
    GdkWindowRedirect is not used anywhere anymore.

 gdk/gdkwindow.h |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkwindow.h b/gdk/gdkwindow.h
index d2b2496..5204869 100644
--- a/gdk/gdkwindow.h
+++ b/gdk/gdkwindow.h
@@ -38,7 +38,6 @@
 G_BEGIN_DECLS
 
 typedef struct _GdkGeometry          GdkGeometry;
-typedef struct _GdkWindowRedirect    GdkWindowRedirect;
 
 /**
  * GdkWindowWindowClass: