Revert "Build Observatory with runtime"

runtime/bin/vmservice/observatory/lib/src/app/chart.dart

 // Copyright (c) 2014, 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.
 
 part of app;
 
 class GoogleChart {
   static var _api;
 
   /// Get access to the JsObject containing the Google Chart API:
@@ skipping 108 matching lines @@
       options['sortAscending'] = props['ascending'];
     }
   }
 
   /// Draw this chart using [table] and the current [options].
   void draw(DataTable table) {
     var jsOptions = new JsObject.jsify(options);
     _chart.callMethod('draw', [table._table, jsOptions]);
   }
 }