Oilpan: remove redundant WILL_BE_EAGERLY_TRACED() declarations.

Source/core/animation/InterpolationEffect.h

Index: Source/core/animation/InterpolationEffect.h
diff --git a/Source/core/animation/InterpolationEffect.h b/Source/core/animation/InterpolationEffect.h
index 4ca554caf318d537b61d1546b369b0b6f720aa11..6c1f07bf6a56ce53bd0bedd7a1e32e4451cbf917 100644
--- a/Source/core/animation/InterpolationEffect.h
+++ b/Source/core/animation/InterpolationEffect.h
@@ -28,6 +28,11 @@ public:
 
     void trace(Visitor*);
 
+private:
+    InterpolationEffect()
+    {
+    }
+
     class InterpolationRecord : public NoBaseWillBeGarbageCollectedFinalized<InterpolationRecord> {
     public:
         RefPtrWillBeMember<Interpolation> m_interpolation;
@@ -56,17 +61,9 @@ public:
         }
     };
 
-private:
-    InterpolationEffect()
-    {
-    }
-
     WillBeHeapVector<OwnPtrWillBeMember<InterpolationRecord> > m_interpolations;
 };
 
-WILL_BE_EAGERLY_TRACED(InterpolationEffect);
-WILL_BE_EAGERLY_TRACED(InterpolationEffect::InterpolationRecord);
-
 } // namespace blink
 
 #endif // InterpolationEffect_h