[gtk+] gdkwindow: Remove unused vfunc

[Benjamin Otte <otte src gnome org>]

commit bdcfc17c436ae3e76ec8f196ff7c1e21ad48bb35
Author: Benjamin Otte <otte redhat com>
Date:   Wed Nov 30 15:08:12 2016 +0100

    gdkwindow: Remove unused vfunc
    
    GdkGLContext knows how to realize itself.

 gdk/gdkwindowimpl.h |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/gdk/gdkwindowimpl.h b/gdk/gdkwindowimpl.h
index ab1c180..d15b9da 100644
--- a/gdk/gdkwindowimpl.h
+++ b/gdk/gdkwindowimpl.h
@@ -299,9 +299,6 @@ struct _GdkWindowImplClass
                                           gboolean        attached,
                                            GdkGLContext   *share,
                                            GError        **error);
-  gboolean     (* realize_gl_context)     (GdkWindow      *window,
-                                           GdkGLContext   *context,
-                                           GError        **error);
   void         (*invalidate_for_new_frame)(GdkWindow      *window,
                                            cairo_region_t *update_area);