Remove ~1750 superfluous includes from core

Source/core/page/PageGroup.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #include "config.h"
 #include "core/page/PageGroup.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/DocumentStyleSheetCollection.h"
 #include "core/page/CaptionUserPreferences.h"
 #include "core/page/Frame.h"
 #include "core/page/GroupSettings.h"
 #include "core/page/Page.h"
-#include "core/page/Settings.h"
 #include "core/storage/StorageNamespace.h"
 
 namespace WebCore {
 
 PageGroup::PageGroup()
     : m_groupSettings(GroupSettings::create())
 {
 }
 
 PageGroup::~PageGroup()
@@ skipping 68 matching lines @@
 CaptionUserPreferences* PageGroup::captionPreferences()
 {
     if (!m_captionPreferences)
         m_captionPreferences = CaptionUserPreferences::create(this);
 
     return m_captionPreferences.get();
 }
 
 
 } // namespace WebCore