diff --git a/include/boost/regex/static_mutex.hpp b/include/boost/regex/static_mutex.hpp
deleted file mode 100644
index 4984abca..00000000
--- a/include/boost/regex/static_mutex.hpp
+++ /dev/null
@@ -1,180 +0,0 @@
-/*
- *
- * Copyright (c) 2004
- * John Maddock
- *
- * Use, modification and distribution are subject to the 
- * Boost Software License, Version 1.0. (See accompanying file 
- * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- *
- */
- 
- /*
-  *   LOCATION:    see http://www.boost.org for most recent version.
-  *   FILE         static_mutex.hpp
-  *   VERSION      see <boost/version.hpp>
-  *   DESCRIPTION: Declares static_mutex lock type, there are three different
-  *                implementations: POSIX pthreads, WIN32 threads, and portable,
-  *                these are described in more detail below.
-  */
-
-#ifndef BOOST_REGEX_STATIC_MUTEX_HPP
-#define BOOST_REGEX_STATIC_MUTEX_HPP
-
-#include <boost/config.hpp>
-#include <boost/regex/config.hpp> // dll import/export options.
-
-#ifdef BOOST_HAS_PTHREADS
-#include <pthread.h>
-#endif
-
-#if defined(BOOST_HAS_PTHREADS) && defined(PTHREAD_MUTEX_INITIALIZER)
-//
-// pthreads version:
-// simple wrap around a pthread_mutex_t initialized with
-// PTHREAD_MUTEX_INITIALIZER.
-//
-namespace boost{
-
-class BOOST_REGEX_DECL scoped_static_mutex_lock;
-
-class static_mutex
-{
-public:
-   typedef scoped_static_mutex_lock scoped_lock;
-   pthread_mutex_t m_mutex;
-};
-
-#define BOOST_STATIC_MUTEX_INIT { PTHREAD_MUTEX_INITIALIZER, }
-
-class BOOST_REGEX_DECL scoped_static_mutex_lock
-{
-public:
-   scoped_static_mutex_lock(static_mutex& mut, bool lk = true);
-   ~scoped_static_mutex_lock();
-   operator void const*()const;
-   bool locked()const;
-   void lock();
-   void unlock();
-private:
-   static_mutex& m_mutex;
-   bool m_have_lock;
-};
-
-inline scoped_static_mutex_lock::operator void const*()const
-{
-   return locked() ? this : 0;
-}
-
-inline bool scoped_static_mutex_lock::locked()const
-{
-   return m_have_lock;
-}
-
-} // namespace boost
-#elif defined(BOOST_HAS_WINTHREADS)
-//
-// Win32 version:
-// Use a 32-bit int as a lock, along with a test-and-set
-// implementation using InterlockedCompareExchange.
-//
-
-#include <boost/cstdint.hpp>
-
-namespace boost{
-
-class BOOST_REGEX_DECL scoped_static_mutex_lock;
-
-class static_mutex
-{
-public:
-   typedef scoped_static_mutex_lock scoped_lock;
-   boost::int32_t m_mutex;
-};
-
-#define BOOST_STATIC_MUTEX_INIT { 0, }
-
-class BOOST_REGEX_DECL scoped_static_mutex_lock
-{
-public:
-   scoped_static_mutex_lock(static_mutex& mut, bool lk = true);
-   ~scoped_static_mutex_lock();
-   operator void const*()const;
-   bool locked()const;
-   void lock();
-   void unlock();
-private:
-   static_mutex& m_mutex;
-   bool m_have_lock;
-   scoped_static_mutex_lock(const scoped_static_mutex_lock&);
-   scoped_static_mutex_lock& operator=(const scoped_static_mutex_lock&);
-};
-
-inline scoped_static_mutex_lock::operator void const*()const
-{
-   return locked() ? this : 0;
-}
-
-inline bool scoped_static_mutex_lock::locked()const
-{
-   return m_have_lock;
-}
-
-} // namespace
-
-#else
-//
-// Portable version of a static mutex based on Boost.Thread library:
-// This has to use a single mutex shared by all instances of static_mutex
-// because boost::call_once doesn't alow us to pass instance information
-// down to the initialisation proceedure.  In fact the initialisation routine
-// may need to be called more than once - but only once per instance.
-//
-#include <boost/thread/once.hpp>
-#include <boost/thread/recursive_mutex.hpp>
-
-namespace boost{
-
-class BOOST_REGEX_DECL scoped_static_mutex_lock;
-extern "C" BOOST_REGEX_DECL void free_static_mutex();
-
-class BOOST_REGEX_DECL static_mutex
-{
-public:
-   typedef scoped_static_mutex_lock scoped_lock;
-   static void init();
-   static boost::recursive_mutex* m_pmutex;
-   static boost::once_flag m_once;
-};
-
-#define BOOST_STATIC_MUTEX_INIT {  }
-
-class BOOST_REGEX_DECL scoped_static_mutex_lock
-{
-public:
-   scoped_static_mutex_lock(static_mutex& mut, bool lk = true);
-   ~scoped_static_mutex_lock();
-   operator void const*()const;
-   bool locked()const;
-   void lock();
-   void unlock();
-private:
-   boost::recursive_mutex::scoped_lock* m_plock;
-   bool m_have_lock;
-};
-
-inline scoped_static_mutex_lock::operator void const*()const
-{
-   return locked() ? this : 0;
-}
-
-inline bool scoped_static_mutex_lock::locked()const
-{
-   return m_have_lock;
-}
-
-} // namespace
-
-#endif
-
-#endif