Removed Polymer from Observatory deps

packages/polymer/test/force_ready_test.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import 'dart:async';
-import 'dart:html';
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
-import 'package:polymer/polymer.dart';
-
-main() => initPolymer().then((zone) => zone.run(() {
-  useHtmlConfiguration();
-
-  setUp(() => window.on['HTMLImportsLoaded']);
-
-  /// We do not port the full test, since this just proxies through to the
-  /// polymer js implementation.
-  test('can force ready', () {
-    return new Future(() {}).then((_) {
-      expect(Polymer.waitingFor.length, 1);
-      expect(Polymer.waitingFor[0], querySelector('polymer-element'));
-      Polymer.forceReady();
-      return Polymer.onReady;
-    });
-  });
-}));