Remove unused animation code after SVG prop migration

Source/core/svg/properties/SVGAnimatedProperty.h

 /*
  * Copyright (C) 2013 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.
 G*     * Redistributions in binary form must reproduce the above
@@ skipping 75 matching lines @@
 
     void setReadOnly()
     {
         m_isReadOnly = true;
     }
 
     bool isSpecified() const;
 
 protected:
     SVGAnimatedPropertyBase(AnimatedPropertyType, SVGElement*, const QualifiedName& attributeName);
-    void commitChange();
 
 private:
     const AnimatedPropertyType m_type;
     bool m_isReadOnly;
     bool m_isAnimating;
 
     // This reference is kept alive from V8 wrapper
     SVGElement* m_contextElement;
 
     const QualifiedName& m_attributeName;
@@ skipping 203 matching lines @@
     // When animated:
     //     m_animValTearOff targets m_currentValue.
     //     m_baseValTearOff targets m_baseValue.
     RefPtr<TearOffType> m_baseValTearOff;
     RefPtr<TearOffType> m_animValTearOff;
 };
 
 }
 
 #endif // SVGAnimatedProperty_h