[gdlmm] remove an useless header imported

[Fabien Parent <fparent src gnome org>]

commit a13665bc71d16dc4b9551b7c64e337897b702936
Author: Fabien Parent <parent f gmail com>
Date:   Wed Nov 25 12:47:12 2009 +0100

    remove an useless header imported

 examples/dock.cc |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/examples/dock.cc b/examples/dock.cc
index d0ab69b..dec10c5 100644
--- a/examples/dock.cc
+++ b/examples/dock.cc
@@ -17,8 +17,6 @@
  */
 
 #include <gtkmm.h>
-#include <gtk/gtk.h>
-
 #include <gdlmm.h>
 #include <gdl/gdl.h>