Removed Polymer from Observatory deps

packages/polymer/test/event_binding_release_handler_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.
-
-library polymer.test.event_binding_release_handler_test;
-
-import 'dart:async';
-import 'dart:html';
-import 'package:polymer/polymer.dart';
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
-import 'package:template_binding/template_binding.dart';
-
-@CustomTag('x-foo')
-class XFoo extends PolymerElement {
-  @PublishedProperty(reflect: true)
-  int count = 1;
-
-  XFoo.created() : super.created();
-
-  increment() {
-    ++count;
-  }
-}
-
-main() {
-  // Do not run the test in the zone so the future does not trigger a
-  // dirtyCheck. We want to verify that event bindings trigger dirty checks on
-  // their own.
-  initPolymer();
-
-  useHtmlConfiguration();
-
-  setUp(() => Polymer.onReady);
-
-  test('event handlers can be released', () {
-    XFoo element = querySelector('x-foo');
-    expect(element, isNotNull);
-    ButtonElement button = element.shadowRoot.querySelector('button');
-    expect(button, isNotNull);
-
-    button.click();
-    return new Future(() {}).then((_) {
-      expect(element.shadowRoot.querySelector('p').text, 'Count: 2');
-      // Remove and detach the element so the binding is invalidated.
-      element.remove();
-      element.detached();
-    }).then((_) => new Future(() {})).then((_) {
-      // Clicks should no longer affect the elements count.
-      button.click();
-      // TODO(jakemac): This is flaky so its commented out, (the rest of the
-      // test is not flaky). Figure out how to make this not flaky.
-//      expect(element.count, 2);
-    });
-  });
-}