Fix Polymer licensing issues

third_party/web-animations-js/sources/src/element-animatable.js

Index: third_party/web-animations-js/sources/src/element-animatable.js
diff --git a/third_party/web-animations-js/sources/src/element-animatable.js b/third_party/web-animations-js/sources/src/element-animatable.js
deleted file mode 100644
index 694389a120ee42199b2673aeeaf6d18ab8a29281..0000000000000000000000000000000000000000
--- a/third_party/web-animations-js/sources/src/element-animatable.js
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2014 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-//     You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-//     See the License for the specific language governing permissions and
-// limitations under the License.
-
-(function(scope) {
-  window.Element.prototype.animate = function(effectInput, timingInput) {
-    return scope.timeline._play(scope.Animation(this, effectInput, timingInput));
-  };
-})(webAnimations1);