[gtk+] Resolve redefinition of typedef GtkCssNode

[Matthias Clasen <matthiasc src gnome org>]

commit 316e7c5adc5605cd66ea6b3c67de8618fcf8f975
Author: William Hua <william attente ca>
Date:   Thu Apr 9 09:28:30 2015 -0400

    Resolve redefinition of typedef GtkCssNode
    
    This causes a build failure under Mac OS because GtkCssNode is defined
    in both gtk/gtkcssnodeprivate.h and gtk/gtkcsstypesprivate.h.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=747560

 gtk/gtkcssnodeprivate.h |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcssnodeprivate.h b/gtk/gtkcssnodeprivate.h
index 8c8a4a4..95e5cd2 100644
--- a/gtk/gtkcssnodeprivate.h
+++ b/gtk/gtkcssnodeprivate.h
@@ -31,7 +31,6 @@ G_BEGIN_DECLS
 #define GTK_IS_CSS_NODE_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_NODE))
 #define GTK_CSS_NODE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_NODE, GtkCssNodeClass))
 
-typedef struct _GtkCssNode           GtkCssNode;
 typedef struct _GtkCssNodeClass      GtkCssNodeClass;
 
 struct _GtkCssNode