treesortable: Remove class check macro

diff --git a/gtk/gtktreesortable.h b/gtk/gtktreesortable.h
index a0579829daf2fd9f234e56b5fd55ba397bcfdd61..be64f893012c861daeaa29c8190143ce00524ebe 100644 (file)
--- a/gtk/gtktreesortable.h
+++ b/gtk/gtktreesortable.h
@@ -31,7 +31,6 @@ G_BEGIN_DECLS
 
 #define GTK_TYPE_TREE_SORTABLE            (gtk_tree_sortable_get_type ())
 #define GTK_TREE_SORTABLE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_TREE_SORTABLE, GtkTreeSortable))
-#define GTK_TREE_SORTABLE_CLASS(obj)      (G_TYPE_CHECK_CLASS_CAST ((obj), GTK_TYPE_TREE_SORTABLE, GtkTreeSortableIface))
 #define GTK_IS_TREE_SORTABLE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_TREE_SORTABLE))
 #define GTK_TREE_SORTABLE_GET_IFACE(obj)  (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GTK_TYPE_TREE_SORTABLE, GtkTreeSortableIface))