Removed Polymer from Observatory deps

packages/polymer_expressions/lib/async.dart

Index: packages/polymer_expressions/lib/async.dart
diff --git a/packages/polymer_expressions/lib/async.dart b/packages/polymer_expressions/lib/async.dart
deleted file mode 100644
index 23e98468a9b6e341b5445aa69af5496243d319b1..0000000000000000000000000000000000000000
--- a/packages/polymer_expressions/lib/async.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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_expressions.async;
-
-import 'dart:async';
-import 'package:observe/observe.dart';
-
-class StreamBinding<T> extends ObservableBox {
-  final Stream<T> stream;
-
-  StreamBinding(this.stream) {
-    stream.listen((T i) { value = i; });
-  }
-
-}