[mutter] window: Remove unused prototype

[Jasper St. Pierre <jstpierre src gnome org>]

commit 7c0a3dfeb8030318cd53edb98c0a80752cbb2bc2
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Mon Apr 21 11:20:54 2014 -0400

    window: Remove unused prototype

 src/core/window-private.h |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/core/window-private.h b/src/core/window-private.h
index 89c2b7b..2efd620 100644
--- a/src/core/window-private.h
+++ b/src/core/window-private.h
@@ -645,8 +645,6 @@ void meta_window_update_sync_request_counter (MetaWindow *window,
 
 void meta_window_handle_mouse_grab_op_event  (MetaWindow         *window,
                                               const ClutterEvent *event);
-void meta_window_handle_mouse_grab_op_xevent (MetaWindow         *window,
-                                              XIDeviceEvent      *xevent);
 
 GList* meta_window_get_workspaces (MetaWindow *window);