Remove duplicated headers from core/

Source/core/platform/graphics/filters/FEOffset.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 12 matching lines @@
  */
 
 #include "config.h"
 
 #include "core/platform/graphics/filters/FEOffset.h"
 
 #include "SkFlattenableBuffers.h"
 #include "SkOffsetImageFilter.h"
 
 #include "core/platform/graphics/GraphicsContext.h"
-#include "core/platform/graphics/filters/Filter.h"
 #include "core/platform/graphics/filters/SkiaImageFilterBuilder.h"
 #include "platform/text/TextStream.h"
 #include "third_party/skia/include/core/SkDevice.h"
 
 namespace WebCore {
 
 FEOffset::FEOffset(Filter* filter, float dx, float dy)
     : FilterEffect(filter)
     , m_dx(dx)
     , m_dy(dy)
@@ skipping 75 matching lines @@
 {
     writeIndent(ts, indent);
     ts << "[feOffset";
     FilterEffect::externalRepresentation(ts);
     ts << " dx=\"" << dx() << "\" dy=\"" << dy() << "\"]\n";
     inputEffect(0)->externalRepresentation(ts, indent + 1);
     return ts;
 }
 
 } // namespace WebCore