Removed dead code.

src/blackmisc/lockfree.cpp

@@ -1,23 +0,0 @@
-/* Copyright (C) 2015
-* swift project Community / Contributors
-*
-* This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
-* directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
-* including this file, may be copied, modified, propagated, or distributed except according to the terms
-* contained in the LICENSE file.
-*/
-
-#include "lockfree.h"
-
-namespace BlackMisc
-{
-    namespace Private
-    {
-        // this is only needed for GCC <= 4.9, but we define it for all compilers to avoid warning about empty cpp file
-        QMutex *atomicSharedPtrMutex()
-        {
-            static QMutex mutex(QMutex::Recursive);
-            return &mutex;
-        }
-    }
-};

src/blackmisc/lockfree.h

@@ -38,14 +38,6 @@ namespace BlackMisc
     template <typename>
     class LockFree;
 
-    namespace Private
-    {
-        //! \cond PRIVATE
-        //! \private
-        BLACKMISC_EXPORT QMutex *atomicSharedPtrMutex();
-        //! \endcond
-    }
-
     /*!
      * Return value of LockFree::read(). Allows any one thread to safely read from the lock-free object.
      */