Removed Polymer from Observatory deps

packages/polymer/lib/init.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 that automatically initializes polymer elements without having to
-/// write a main for your application.
-///
-/// If a polymer application is written entirely with `<polymer-element>` tags
-/// and there is no initialization code that needs to happen before these
-/// elements are created, then, instead of creating your own `main`, you can
-/// simply include a script tag loading this library:
-///
-///    <script type="application/dart">export "package:polymer/init.dart";
-///    </script>
-///
-/// This script tag should be placed after all HTML imports on your page.
-library polymer.init;
-
-import 'dart:async';
-import 'package:polymer/polymer.dart';
-
-/// Returns a [Future<Zone>] that code should be executed in for dirty checking.
-/// The returned future will complete once polymer is ready and all @initMethod
-/// and @whenPolymerReady functions have been executed.
-Future<Zone> main() =>
-    initPolymer().then((zone) => Polymer.onReady.then((_) => zone));