[gtk+] docs: remove link to missing example

[William Jon McCann <mccann src gnome org>]

commit 201b093719b85db20f69f372481e3a017bd37366
Author: William Jon McCann <william jon mccann gmail com>
Date:   Mon Jan 20 16:17:21 2014 -0500

    docs: remove link to missing example
    
    Removed in e95490c15e8a95cb72601e4d66e806b55d7b4d82 etc.

 gdk/gdkwindow.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index e613d9b..1124f51 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -6657,8 +6657,7 @@ gdk_window_get_composited (GdkWindow *window)
  * and an expose event is emitted on the parent of the composited
  * window. It is the responsibility of the parent's expose handler
  * to manually merge the off-screen content onto the screen in
- * whatever way it sees fit. See <xref linkend="composited-window-example"/>
- * for an example.
+ * whatever way it sees fit.
  *
  * It only makes sense for child windows to be composited; see
  * gdk_window_set_opacity() if you need translucent toplevel