SVG: Remove SVGAnimatedPropertyBase::startAnimation and its overrides which are already all NOOP

Source/core/svg/SVGAnimatedNumberOptionalNumber.cpp

 /*
  * Copyright (C) Research In Motion Limited 2011. 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
@@ skipping 15 matching lines @@
 SVGAnimatedNumberOptionalNumber::SVGAnimatedNumberOptionalNumber(SVGElement* contextElement, const QualifiedName& attributeName, float initialFirstValue, float initialSecondValue)
     : SVGAnimatedPropertyCommon<SVGNumberOptionalNumber>(contextElement, attributeName,
         SVGNumberOptionalNumber::create(SVGNumber::create(initialFirstValue), SVGNumber::create(initialSecondValue)))
     , m_firstNumber(SVGAnimatedNumber::create(contextElement, attributeName, baseValue()->firstNumber()))
     , m_secondNumber(SVGAnimatedNumber::create(contextElement, attributeName, baseValue()->secondNumber()))
 {
     m_firstNumber->setParentOptionalNumber(this);
     m_secondNumber->setParentOptionalNumber(this);
 }
 
-void SVGAnimatedNumberOptionalNumber::animationStarted()
-{
-    SVGAnimatedPropertyCommon<SVGNumberOptionalNumber>::animationStarted();
-    m_firstNumber->animationStarted();
-    m_secondNumber->animationStarted();
-}
-
 void SVGAnimatedNumberOptionalNumber::setAnimatedValue(PassRefPtr<SVGPropertyBase> value)
 {
     SVGAnimatedPropertyCommon<SVGNumberOptionalNumber>::setAnimatedValue(value);
     m_firstNumber->setAnimatedValue(currentValue()->firstNumber());
     m_secondNumber->setAnimatedValue(currentValue()->secondNumber());
 }
 
 void SVGAnimatedNumberOptionalNumber::animationEnded()
 {
     SVGAnimatedPropertyCommon<SVGNumberOptionalNumber>::animationEnded();
     m_firstNumber->animationEnded();
     m_secondNumber->animationEnded();
 }
 
 bool SVGAnimatedNumberOptionalNumber::needsSynchronizeAttribute()
 {
     return m_firstNumber->needsSynchronizeAttribute()
         || m_secondNumber->needsSynchronizeAttribute();
 }
 
 }