Removed Polymer from Observatory deps

packages/js/README.md

Index: packages/js/README.md
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-Methods and annotations to specify interoperability with JavaScript APIs.
-
-*This packages requires Dart SDK 1.13.0.*
-
-*This is beta software. Please files [issues].*
-
-### Adding the dependency
-
-Add the following to your `pubspec.yaml`:
-
-```yaml
-dependencies:
-  js: ^0.6.0
-```
-
-### Example
-
-See the [Chart.js Dart API](https://github.com/google/chartjs.dart/) for an
-end-to-end example.
-
-### Usage
-
-#### Calling methods
-
-```dart
-// Calls invoke JavaScript `JSON.stringify(obj)`.
-@JS("JSON.stringify")
-external String stringify(obj);
-```
-
-#### Classes and Namespaces
-
-```dart
-@JS('google.maps')
-library maps;
-
-// Invokes the JavaScript getter `google.maps.map`.
-external Map get map;
-
-// `new Map` invokes JavaScript `new google.maps.Map(location)`
-@JS()
-class Map {
-  external Map(Location location);
-  external Location getLocation();
-}
-
-// `new Location(...)` invokes JavaScript `new google.maps.LatLng(...)`
-//
-// We recommend against using custom JavaScript names whenever
-// possible. It is easier for users if the JavaScript names and Dart names
-// are consistent.
-@JS("LatLng")
-class Location {
-  external Location(num lat, num lng);
-}
-```
-
-#### JavaScript object literals
-
-Many JavaScript APIs take an object literal as an argument. For example:
-```js
-// JavaScript
-printOptions({responsive: true});
-```
-
-If you want to use `printOptions` from Dart, you cannot simply pass a Dart `Map`
-object – they are are "opaque" in JavaScript.
-
-
-Instead, create a Dart class with both the `@JS()` and
-`@anonymous` annotations.
-
-```dart
-// Dart
-void main() {
-  printOptions(new Options(responsive: true));
-}
-
-@JS()
-external printOptions(Options options);
-
-@JS()
-@anonymous
-class Options {
-  external bool get responsive;
-
-  external factory Options({bool responsive});
-}
-```
-
-#### Passing functions to JavaScript.
-
-If you are passing a Dart function to a JavaScript API, you must wrap it using
-`allowInterop` or `allowInteropCaptureThis`.
-
-## Contributing and Filing Bugs
-
-Please file bugs and features requests on the [Github issue tracker][issues].
-
-We also love and accept community contributions, from API suggestions to pull requests.
-Please file an issue before beginning work so we can discuss the design and implementation.
-We are trying to create issues for all current and future work, so if something there intrigues you (or you need it!) join in on the discussion.
-
-Code contributors must sign the
-[Google Individual Contributor License Agreement](https://developers.google.com/open-source/cla/individual?csw=1).
-
-[issues]: https://goo.gl/j3rzs0