Remove some unused includes from core/css and core/dom

Source/core/dom/StyleElement.cpp

 /*
  * Copyright (C) 2006, 2007 Rob Buis
  * Copyright (C) 2008 Apple, 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
  * 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/dom/StyleElement.h"
 
 #include "core/css/MediaList.h"
 #include "core/css/MediaQueryEvaluator.h"
 #include "core/css/StyleSheetContents.h"
-#include "core/dom/Attribute.h"
 #include "core/dom/Document.h"
 #include "core/dom/DocumentStyleSheetCollection.h"
 #include "core/dom/Element.h"
 #include "core/dom/ScriptableDocumentParser.h"
 #include "core/page/ContentSecurityPolicy.h"
 #include <wtf/text/StringBuilder.h>
 #include <wtf/text/TextPosition.h>
 
 namespace WebCore {
 
@@ skipping 163 matching lines @@
     return true;
 }
 
 void StyleElement::startLoadingDynamicSheet(Document* document)
 {
     ASSERT(document);
     document->styleSheetCollection()->addPendingSheet();
 }
 
 }