diff --git a/Cone_spanners_2/include/CGAL/Cone_spanners_2/_cxx0x_hack.h b/Cone_spanners_2/include/CGAL/Cone_spanners_2/_cxx0x_hack.h
deleted file mode 100755
index 19c47ef971a..00000000000
--- a/Cone_spanners_2/include/CGAL/Cone_spanners_2/_cxx0x_hack.h
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright (c) 2013  The University of Western Sydney, Australia.
-// All rights reserved.
-//
-// This file is part of CGAL (www.cgal.org).
-// You can redistribute it and/or modify it under the terms of the GNU
-// General Public License as published by the Free Software Foundation,
-// either version 3 of the License, or (at your option) any later version.
-//
-// Licensees holding a valid commercial license may use this file in
-// accordance with the commercial license agreement provided with the software.
-//
-// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
-// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-//
-// $URL$
-// $Id$
-// 
-//
-// Author(s)     : Quincy Tse, Weisheng Si
-
-/** @file _cxx0x_hack.h
- *
- * This header declares constants to help make code cross-compile between
- * C++11 and prior versions.
- */
-
-#ifndef _CXX0X_HACK_H
-#define _CXX0X_HACK_H
-
-#if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
-#define GXX11
-// XXX Hacks for g++-4.5
-#define nullptr NULL
-#ifndef _GLIBCXX_NOEXCEPT
-#define _GLIBCXX_NOEXCEPT throw ()
-#endif
-#else
-#define nullptr NULL
-#include <CGAL/result_of.h>
-#define _GLIBCXX_NOEXCEPT throw ()
-#endif // CXX11
-
-#endif // _CXX0X_HACK_H