Remove unnecessary includes from collection / nodelist classes

Source/core/html/HTMLCollection.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Samsung Electronics. 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.
@@ skipping 10 matching lines @@
  *
  */
 
 #ifndef HTMLCollection_h
 #define HTMLCollection_h
 
 #include "core/dom/LiveNodeListBase.h"
 #include "core/html/CollectionIndexCache.h"
 #include "core/html/CollectionType.h"
 #include "wtf/Forward.h"
-#include "wtf/HashMap.h"
-#include "wtf/Vector.h"
 
 namespace blink {
 
 class HTMLCollection : public RefCountedWillBeGarbageCollectedFinalized<HTMLCollection>, public ScriptWrappable, public LiveNodeListBase {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLCollection);
 public:
     enum ItemAfterOverrideType {
         OverridesItemAfter,
         DoesNotOverrideItemAfter,
     };
@@ skipping 115 matching lines @@
 {
     if (!attrName || shouldInvalidateTypeOnAttributeChange(invalidationType(), *attrName))
         invalidateCache();
     else if (*attrName == HTMLNames::idAttr || *attrName == HTMLNames::nameAttr)
         invalidateIdNameCacheMaps();
 }
 
 } // namespace
 
 #endif