Removed Polymer from Observatory deps

packages/polymer/test/attr_deserialize_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:html';
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
-import 'package:polymer/polymer.dart';
-
-@CustomTag('my-element')
-class MyElement extends PolymerElement {
-  MyElement.created() : super.created();
-
-  @published double volume;
-  @published int factor;
-  @published bool crankIt;
-  @published String msg;
-  @published DateTime time;
-  @published Object json;
-}
-
-main() => initPolymer().then((zone) => zone.run(() {
-  useHtmlConfiguration();
-
-  setUp(() => Polymer.onReady);
-
-  test('attributes were deserialized', () {
-    MyElement elem = querySelector('my-element');
-    final msg = 'property should match attribute.';
-    expect(elem.volume, 11.0, reason: '"volume" should match attribute');
-    expect(elem.factor, 3, reason: '"factor" should match attribute');
-    expect(elem.crankIt, true, reason: '"crankIt" should match attribute');
-    expect(elem.msg, "Yo!", reason: '"msg" should match attribute');
-    expect(elem.time, DateTime.parse('2013-08-08T18:34Z'),
-        reason: '"time" should match attribute');
-    expect(elem.json, {'here': 'is', 'some': 'json', 'x': 123},
-        reason: '"json" should match attribute');
-
-    var text = elem.shadowRoot.text;
-    // Collapse adjacent whitespace like a browser would:
-    text = text.replaceAll('\n', ' ').replaceAll(new RegExp(r'\s+'), ' ');
-
-    // Note: using "${33.0}" because the toString differs in JS vs Dart VM.
-    expect(text, " Yo! The volume is ${33.0} !! The time is "
-        "2013-08-08 18:34:00.000Z and here's some JSON: "
-        "{here: is, some: json, x: 123} ",
-        reason: 'text should match expected HTML template');
-  });
-}));