Remove even more @keyframes related code.

sky/engine/core/animation/css/CSSAnimations.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 22 matching lines @@
 
 #include "gen/sky/core/StylePropertyShorthand.h"
 #include "sky/engine/core/animation/ActiveAnimations.h"
 #include "sky/engine/core/animation/AnimationTimeline.h"
 #include "sky/engine/core/animation/KeyframeEffectModel.h"
 #include "sky/engine/core/animation/LegacyStyleInterpolation.h"
 #include "sky/engine/core/animation/css/CSSAnimatableValueFactory.h"
 #include "sky/engine/core/animation/css/CSSPropertyEquality.h"
 #include "sky/engine/core/css/CSSPropertyMetadata.h"
 #include "sky/engine/core/css/CSSValueList.h"
-#include "sky/engine/core/css/StyleKeyframe.h"
-#include "sky/engine/core/css/StyleRuleKeyframes.h"
 #include "sky/engine/core/dom/Element.h"
 #include "sky/engine/core/events/AnimationEvent.h"
 #include "sky/engine/core/events/TransitionEvent.h"
 #include "sky/engine/core/rendering/RenderLayer.h"
 #include "sky/engine/core/rendering/RenderObject.h"
 #include "sky/engine/core/rendering/style/KeyframeList.h"
 #include "sky/engine/platform/animation/TimingFunction.h"
 #include "sky/engine/public/platform/Platform.h"
 #include "sky/engine/wtf/BitArray.h"
 #include "sky/engine/wtf/HashSet.h"
@@ skipping 380 matching lines @@
     case CSSPropertyTransitionDuration:
     case CSSPropertyTransitionProperty:
     case CSSPropertyTransitionTimingFunction:
         return false;
     default:
         return true;
     }
 }
 
 } // namespace blink