Remove some unused functions in core

Source/core/animation/AnimationStack.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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 33 matching lines @@
 class InertAnimation;
 
 class AnimationStack {
     DISALLOW_ALLOCATION();
     WTF_MAKE_NONCOPYABLE(AnimationStack);
 public:
     AnimationStack();
 
     void add(PassOwnPtrWillBeRawPtr<SampledEffect> effect) { m_effects.append(effect); }
     bool isEmpty() const { return m_effects.isEmpty(); }
-    bool affects(CSSPropertyID) const;
     bool hasActiveAnimationsOnCompositor(CSSPropertyID) const;
     static WillBeHeapHashMap<CSSPropertyID, RefPtrWillBeMember<Interpolation> > activeInterpolations(AnimationStack*, const WillBeHeapVector<RawPtrWillBeMember<InertAnimation> >* newAnimations, const WillBeHeapHashSet<RawPtrWillBeMember<const AnimationPlayer> >* suppressedAnimationPlayers, Animation::Priority, double timelineCurrentTime);
 
     bool getAnimatedBoundingBox(FloatBox&, CSSPropertyID) const;
     void trace(Visitor*);
 
 private:
     void simplifyEffects();
     // Effects sorted by priority. Lower priority at the start of the list.
     WillBeHeapVector<OwnPtrWillBeMember<SampledEffect> > m_effects;
 
     friend class AnimationAnimationStackTest;
 };
 
 } // namespace blink
 
 #endif // AnimationStack_h