[gtk+] Drop a leftover declaration

[Matthias Clasen <matthiasc src gnome org>]

commit b25b33f79faf35619f9c87663a65895864eb2692
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jul 6 16:51:29 2014 -0400

    Drop a leftover declaration
    
    This was left behind when resize grips were removed.

 gtk/gtkrange.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index bec2d47..5f309b9 100644
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -246,8 +246,6 @@ static void update_slider_position   (GtkRange             *range,
                                      gint              mouse_x,
                                      gint              mouse_y);
 static void stop_scrolling           (GtkRange         *range);
-static gboolean modify_allocation_for_window_grip (GtkWidget     *widget,
-                                                   GtkAllocation *allocation);
 
 /* Range methods */