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diff --git a/src/third_party/boost-1.56.0/boost/asio/detail/impl/win_static_mutex.ipp b/src/third_party/boost-1.56.0/boost/asio/detail/impl/win_static_mutex.ipp
deleted file mode 100644
index 84bd45473c6..00000000000
--- a/src/third_party/boost-1.56.0/boost/asio/detail/impl/win_static_mutex.ipp
+++ /dev/null
@@ -1,120 +0,0 @@
-//
-// detail/impl/win_static_mutex.ipp
-// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
-//
-// Distributed under 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)
-//
-
-#ifndef BOOST_ASIO_DETAIL_IMPL_WIN_STATIC_MUTEX_IPP
-#define BOOST_ASIO_DETAIL_IMPL_WIN_STATIC_MUTEX_IPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include <boost/asio/detail/config.hpp>
-
-#if defined(BOOST_ASIO_WINDOWS)
-
-#include <cstdio>
-#include <boost/asio/detail/throw_error.hpp>
-#include <boost/asio/detail/win_static_mutex.hpp>
-#include <boost/asio/error.hpp>
-
-#include <boost/asio/detail/push_options.hpp>
-
-namespace boost {
-namespace asio {
-namespace detail {
-
-void win_static_mutex::init()
-{
- int error = do_init();
- boost::system::error_code ec(error,
- boost::asio::error::get_system_category());
- boost::asio::detail::throw_error(ec, "static_mutex");
-}
-
-int win_static_mutex::do_init()
-{
- using namespace std; // For sprintf.
- wchar_t mutex_name[128];
-#if defined(BOOST_ASIO_HAS_SECURE_RTL)
- swprintf_s(
-#else // defined(BOOST_ASIO_HAS_SECURE_RTL)
- _snwprintf(
-#endif // defined(BOOST_ASIO_HAS_SECURE_RTL)
- mutex_name, 128, L"asio-58CCDC44-6264-4842-90C2-F3C545CB8AA7-%u-%p",
- static_cast<unsigned int>(::GetCurrentProcessId()), this);
-
- HANDLE mutex = ::CreateMutexW(0, TRUE, mutex_name);
- DWORD last_error = ::GetLastError();
- if (mutex == 0)
- return ::GetLastError();
-
- if (last_error == ERROR_ALREADY_EXISTS)
- ::WaitForSingleObject(mutex, INFINITE);
-
- if (initialised_)
- {
- ::ReleaseMutex(mutex);
- ::CloseHandle(mutex);
- return 0;
- }
-
-#if defined(__MINGW32__)
- // Not sure if MinGW supports structured exception handling, so for now
- // we'll just call the Windows API and hope.
-# if defined(UNDER_CE)
- ::InitializeCriticalSection(&crit_section_);
-# else
- if (!::InitializeCriticalSectionAndSpinCount(&crit_section_, 0x80000000))
- {
- last_error = ::GetLastError();
- ::ReleaseMutex(mutex);
- ::CloseHandle(mutex);
- return last_error;
- }
-# endif
-#else
- __try
- {
-# if defined(UNDER_CE)
- ::InitializeCriticalSection(&crit_section_);
-# else
- if (!::InitializeCriticalSectionAndSpinCount(&crit_section_, 0x80000000))
- {
- last_error = ::GetLastError();
- ::ReleaseMutex(mutex);
- ::CloseHandle(mutex);
- return last_error;
- }
-# endif
- }
- __except(GetExceptionCode() == STATUS_NO_MEMORY
- ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH)
- {
- ::ReleaseMutex(mutex);
- ::CloseHandle(mutex);
- return ERROR_OUTOFMEMORY;
- }
-#endif
-
- initialised_ = true;
- ::ReleaseMutex(mutex);
- ::CloseHandle(mutex);
- return 0;
-}
-
-} // namespace detail
-} // namespace asio
-} // namespace boost
-
-#include <boost/asio/detail/pop_options.hpp>
-
-#endif // defined(BOOST_ASIO_WINDOWS)
-
-#endif // BOOST_ASIO_DETAIL_IMPL_WIN_STATIC_MUTEX_IPP