Web Animations: Update naming to reflect spec changes

Source/core/animation/AnimationEffect.idl

Index: Source/core/animation/AnimationEffect.idl
diff --git a/Source/core/animation/AnimationEffect.idl b/Source/core/animation/AnimationEffect.idl
deleted file mode 100644
index 6071df62ce6bc09fd448e92ac1bcef126957e5b6..0000000000000000000000000000000000000000
--- a/Source/core/animation/AnimationEffect.idl
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2014 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.
-
-// http://www.w3.org/TR/web-animations/#the-animationeffect-interface
-
-// TODO(dstockwell): This interface has been removed in the latest spec:
-// https://w3c.github.io/web-animations/
-
-[
-    RuntimeEnabled=WebAnimationsAPI,
-    NoInterfaceObject,
-    WillBeGarbageCollected
-] interface AnimationEffect {
-};