[gtk+] viewport: Remove some unused includes

[Timm Bäder <baedert src gnome org>]

commit 5590a2a94396bb0a6506643f2da35d9ff082744e
Author: Timm Bäder <mail baedert org>
Date:   Mon Jan 15 21:58:36 2018 +0100

    viewport: Remove some unused includes

 gtk/gtkviewport.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkviewport.c b/gtk/gtkviewport.c
index 2e8989d..9c263e6 100644
--- a/gtk/gtkviewport.c
+++ b/gtk/gtkviewport.c
@@ -30,10 +30,8 @@
 #include "gtkintl.h"
 #include "gtkmarshalers.h"
 #include "gtkprivate.h"
-#include "gtkrenderbackgroundprivate.h"
 #include "gtkscrollable.h"
 #include "gtksnapshot.h"
-#include "gtkstylecontextprivate.h"
 #include "gtktypebuiltins.h"
 #include "gtkwidgetprivate.h"