Remove tons of OILPAN.

sky/engine/core/animation/animatable/AnimatableLengthBox.cpp

Index: sky/engine/core/animation/animatable/AnimatableLengthBox.cpp
diff --git a/sky/engine/core/animation/animatable/AnimatableLengthBox.cpp b/sky/engine/core/animation/animatable/AnimatableLengthBox.cpp
index c96607bae199c55a74f2b466ff8d2599cf5e641c..20a0d006cb90e986d95c29992fb5fbd9d4bcfa1d 100644
--- a/sky/engine/core/animation/animatable/AnimatableLengthBox.cpp
+++ b/sky/engine/core/animation/animatable/AnimatableLengthBox.cpp
@@ -52,13 +52,4 @@ bool AnimatableLengthBox::equalTo(const AnimatableValue* value) const
         && bottom()->equals(lengthBox->bottom());
 }
 
-void AnimatableLengthBox::trace(Visitor* visitor)
-{
-    visitor->trace(m_left);
-    visitor->trace(m_right);
-    visitor->trace(m_top);
-    visitor->trace(m_bottom);
-    AnimatableValue::trace(visitor);
-}
-
 }