[gtk+] csswidgetnode: Remove unused include

[Timm Bäder <baedert src gnome org>]

commit 8eb7575c7f6d2b2e6c17490778eccbeefd94e83b
Author: Timm Bäder <mail baedert org>
Date:   Sun Feb 19 15:25:46 2017 +0100

    csswidgetnode: Remove unused include

 gtk/gtkcsswidgetnode.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkcsswidgetnode.c b/gtk/gtkcsswidgetnode.c
index a112d7c..b443b5e 100644
--- a/gtk/gtkcsswidgetnode.c
+++ b/gtk/gtkcsswidgetnode.c
@@ -25,8 +25,6 @@
 #include "gtksettingsprivate.h"
 #include "gtkstylecontextprivate.h"
 #include "gtkwidgetprivate.h"
-/* widgets for special casing go here */
-#include "gtkbox.h"
 
 /* When these change we do a full restyling. Otherwise we try to figure out
  * if we need to change things. */