Delete unused AnimatableValue code

third_party/WebKit/Source/core/animation/animatable/AnimatablePath.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef AnimatablePath_h
 #define AnimatablePath_h
 
 #include "core/CoreExport.h"
 #include "core/animation/animatable/AnimatableValue.h"
 #include "core/style/StylePath.h"
 
 namespace blink {
 
-class CORE_EXPORT AnimatablePath final : public AnimatableValue {
+class AnimatablePath final : public AnimatableValue {
  public:
   ~AnimatablePath() override {}
   static PassRefPtr<AnimatablePath> create(PassRefPtr<StylePath> path) {
     return adoptRef(new AnimatablePath(std::move(path)));
   }
 
-  StylePath* path() const { return m_path.get(); }
-
- protected:
-  PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*,
-                                            double fraction) const override;
-  bool usesDefaultInterpolationWith(const AnimatableValue*) const override;
-
  private:
   explicit AnimatablePath(PassRefPtr<StylePath> path) : m_path(path) {}
   AnimatableType type() const override { return TypePath; }
   bool equalTo(const AnimatableValue*) const override;
   const RefPtr<StylePath> m_path;
 };
 
 DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatablePath, isPath());
 
 }  // namespace blink
 
 #endif  // AnimatablePath_h