[gtk+] Remove an unneeded include

[Matthias Clasen <matthiasc src gnome org>]

commit e7f88838f62cb07d0d47a4fc4a7828fa8dbe0cf5
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jun 7 18:32:24 2011 -0400

    Remove an unneeded include

 tests/testtreesort.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/tests/testtreesort.c b/tests/testtreesort.c
index 63c03bb..bbb9c74 100644
--- a/tests/testtreesort.c
+++ b/tests/testtreesort.c
@@ -21,8 +21,6 @@
 #include "config.h"
 #include <gtk/gtk.h>
 
-#include "gtk/gtktreedatalist.h"
-
 
 typedef struct _ListSort ListSort;
 struct _ListSort