Removed Polymer from Observatory deps

packages/polymer/test/import_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(() => Polymer.onReady);
-
-  // **NOTE**: This test is currently being skipped everywhere until deferred
-  // imports have actual support.
-  test('Polymer.import', () {
-    return Polymer.import(['element_import/import_a.html']).then((_) {
-      expect((querySelector('x-foo') as dynamic).isCustom, true);
-      var dom = document.importNode(
-          (querySelector('#myTemplate') as TemplateElement).content, true);
-      return Polymer.importElements(dom).then((_) {
-        expect((querySelector('x-bar') as dynamic).isCustom, true);
-      });
-    });
-  });
-}));