[gtk+] Remove an unneeded include

[Matthias Clasen <matthiasc src gnome org>]

commit fcb69e110b9ad9d7913677666b2e27302e93d885
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Sep 6 17:12:13 2014 -0400

    Remove an unneeded include

 gtk/gtkdnd.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkdnd.c b/gtk/gtkdnd.c
index 8a100fd..16ea22e 100644
--- a/gtk/gtkdnd.c
+++ b/gtk/gtkdnd.c
@@ -46,7 +46,6 @@
 #include "gtkdnd.h"
 #include "gtkiconhelperprivate.h"
 #include "gtkicontheme.h"
-#include "gtkinvisible.h"
 #include "gtkmain.h"
 #include "gtkplug.h"
 #include "gtktooltip.h"