Remove tons of OILPAN.

sky/engine/core/animation/AnimationTimeline.h

Index: sky/engine/core/animation/AnimationTimeline.h
diff --git a/sky/engine/core/animation/AnimationTimeline.h b/sky/engine/core/animation/AnimationTimeline.h
index 01dbe071a93a25d6a3f0deab7719469d0ac5f069..4e4de5973dbe5dbc491833b1ceda9ef8502b985f 100644
--- a/sky/engine/core/animation/AnimationTimeline.h
+++ b/sky/engine/core/animation/AnimationTimeline.h
@@ -58,7 +58,6 @@ public:
         virtual void cancelWake() = 0;
         virtual void serviceOnNextFrame() = 0;
         virtual ~PlatformTiming() { }
-        virtual void trace(Visitor*) { }
     };
 
     static PassRefPtr<AnimationTimeline> create(Document*, PassOwnPtr<PlatformTiming> = nullptr);
@@ -97,8 +96,6 @@ public:
 #endif
     void wake();
 
-    void trace(Visitor*);
-
 protected:
     AnimationTimeline(Document*, PassOwnPtr<PlatformTiming>);
 
@@ -129,8 +126,6 @@ private:
 
         void timerFired(Timer<AnimationTimelineTiming>*) { m_timeline->wake(); }
 
-        virtual void trace(Visitor*) override;
-
     private:
         RawPtr<AnimationTimeline> m_timeline;
         Timer<AnimationTimelineTiming> m_timer;