Removed Polymer from Observatory deps

packages/polymer/lib/src/build/build_filter.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.
-
-/// Final phase of the polymer transformation: removes any files that are not
-/// needed for deployment.
-library polymer.src.build.build_filter;
-
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-import 'package:code_transformers/messages/build_logger.dart';
-import 'common.dart';
-
-/// Removes any files not needed for deployment, such as internal build
-/// artifacts and non-entry HTML files.
-class BuildFilter extends Transformer with PolymerTransformer {
-  final TransformOptions options;
-  BuildFilter(this.options);
-
-  isPrimary(AssetId id) {
-    // nothing is filtered in debug mode
-    return options.releaseMode &&
-        // TODO(sigmund): remove this exclusion once we have dev_transformers
-        // (dartbug.com/14187)
-        !id.path.startsWith('lib/') &&
-        // may filter non-entry HTML files and internal artifacts
-        (id.extension == '.html' || id.extension == _DATA_EXTENSION) &&
-        // keep any entry points
-        !options.isHtmlEntryPoint(id);
-  }
-
-  apply(Transform transform) {
-    transform.consumePrimary();
-    if (transform.primaryInput.id.extension == _DATA_EXTENSION) {
-      return null;
-    }
-    var logger = new BuildLogger(transform,
-        convertErrorsToWarnings: !options.releaseMode,
-        detailsUri: 'http://goo.gl/5HPeuP');
-    return readPrimaryAsHtml(transform, logger).then((document) {
-      // Keep .html files that don't use polymer, since the app developer might
-      // have non-polymer entrypoints.
-      if (document.querySelectorAll('polymer-element').isEmpty) {
-        transform.addOutput(transform.primaryInput);
-      }
-    });
-  }
-}
-
-const String _DATA_EXTENSION = '._data';