Remove duplicated headers from core/

Source/core/rendering/BidiRun.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #include "config.h"
 #include "core/rendering/BidiRun.h"
 #include "platform/Partitions.h"
 #include "wtf/RefCountedLeakCounter.h"
-#include "wtf/StdLibExtras.h"
 
 using namespace WTF;
 
 namespace WebCore {
 
 DEFINE_DEBUG_ONLY_GLOBAL(RefCountedLeakCounter, bidiRunCounter, ("BidiRun"));
 
 void* BidiRun::operator new(size_t sz)
 {
 #ifndef NDEBUG
     bidiRunCounter.increment();
 #endif
     return partitionAlloc(Partitions::getRenderingPartition(), sz);
 }
 
 void BidiRun::operator delete(void* ptr)
 {
 #ifndef NDEBUG
     bidiRunCounter.decrement();
 #endif
     partitionFree(ptr);
 }
 
 }