Remove some unused functions in core

Source/core/animation/AnimationStack.cpp

 /*
  * 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 53 matching lines @@
             copyToActiveInterpolationMap(*sample, result);
     }
 }
 
 } // namespace
 
 AnimationStack::AnimationStack()
 {
 }
 
-bool AnimationStack::affects(CSSPropertyID property) const
-{
-    for (const auto& effect : m_effects) {
-        if (effect->animation() && effect->animation()->affects(property))
-            return true;
-    }
-    return false;
-}
-
 bool AnimationStack::hasActiveAnimationsOnCompositor(CSSPropertyID property) const
 {
     for (const auto& effect : m_effects) {
         if (effect->animation() && effect->animation()->hasActiveAnimationsOnCompositor(property))
             return true;
     }
     return false;
 }
 
 WillBeHeapHashMap<CSSPropertyID, RefPtrWillBeMember<Interpolation> > AnimationStack::activeInterpolations(AnimationStack* animationStack, const WillBeHeapVector<RawPtrWillBeMember<InertAnimation> >* newAnimations, const WillBeHeapHashSet<RawPtrWillBeMember<const AnimationPlayer> >* suppressedAnimationPlayers, Animation::Priority priority, double timelineCurrentTime)
@@ skipping 66 matching lines @@
             FloatBox expandingBox(originalBox);
             if (!CompositorAnimations::instance()->getAnimatedBoundingBox(expandingBox, *anim->effect(), startRange, endRange))
                 return false;
             box.expandTo(expandingBox);
         }
     }
     return true;
 }
 
 } // namespace blink