Remove unused includes from core/html .cpp files

Source/core/html/MonthInputType.cpp

 /*
  * Copyright (C) 2010 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include "core/html/HTMLInputElement.h"
 #include "core/html/InputTypeNames.h"
 #include "core/platform/DateComponents.h"
 #include <wtf/CurrentTime.h>
 #include <wtf/DateMath.h>
 #include <wtf/MathExtras.h>
 #include <wtf/PassOwnPtr.h>
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 #include "core/html/DateTimeFieldsState.h"
-#include "core/platform/LocalizedStrings.h"
 #include "core/platform/text/PlatformLocale.h"
 #include <wtf/text/WTFString.h>
 #endif
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 static const int monthDefaultStep = 1;
 static const int monthDefaultStepBase = 0;
@@ skipping 110 matching lines @@
     layoutParameters.placeholderForMonth = "--";
     layoutParameters.placeholderForYear = "----";
 }
 
 bool MonthInputType::isValidFormat(bool hasYear, bool hasMonth, bool hasWeek, bool hasDay, bool hasAMPM, bool hasHour, bool hasMinute, bool hasSecond) const
 {
     return hasYear && hasMonth;
 }
 #endif
 } // namespace WebCore