Remove tons of OILPAN.

sky/engine/core/animation/animatable/AnimatableFilterOperations.h

Index: sky/engine/core/animation/animatable/AnimatableFilterOperations.h
diff --git a/sky/engine/core/animation/animatable/AnimatableFilterOperations.h b/sky/engine/core/animation/animatable/AnimatableFilterOperations.h
index 2e660a7523452cdec086fea4374d55599f4839d8..d685c3f5688aa613c71111dc7e78369f702d0f67 100644
--- a/sky/engine/core/animation/animatable/AnimatableFilterOperations.h
+++ b/sky/engine/core/animation/animatable/AnimatableFilterOperations.h
@@ -45,8 +45,6 @@ public:
     }
     const FilterOperations& operations() const { return m_operations; }
 
-    virtual void trace(Visitor* visitor) override { AnimatableValue::trace(visitor); }
-
 protected:
     virtual PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const override;
     virtual bool usesDefaultInterpolationWith(const AnimatableValue*) const override;