Fix Polymer licensing issues

third_party/web-animations-js/sources/target-loader.js

Index: third_party/web-animations-js/sources/target-loader.js
diff --git a/third_party/web-animations-js/sources/target-loader.js b/third_party/web-animations-js/sources/target-loader.js
deleted file mode 100644
index a4a9d30fd414913d2b342cdd669ae3336cbb0303..0000000000000000000000000000000000000000
--- a/third_party/web-animations-js/sources/target-loader.js
+++ /dev/null
@@ -1,13 +0,0 @@
-(function() {
-  var target = webAnimationsTargetConfig.defaultTarget;
-  if (typeof webAnimationsSourceTarget != 'undefined')
-    target = webAnimationsSourceTarget;
-
-  // Native implementation detection.
-
-  var scripts = document.getElementsByTagName('script');
-  var location = scripts[scripts.length - 1].src.replace(/[^\/]+$/, '');
-  webAnimationsTargetConfig[target].src.forEach(function(sourceFile) {
-    document.write('<script src="' + location + sourceFile + '"></script>');
-  });
-})();