Cleanup sky/sdk/examples

sky/sdk/example/old/stocks/lib/stock_data.dart

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:convert';
 import 'dart:math';
 import 'package:sky/framework/net/fetch.dart';
 
 // Snapshot from http://www.nasdaq.com/screening/company-list.aspx
 // Fetched 2/23/2014.
@@ skipping 52 matching lines @@
       String json = response.bodyAsString();
       JsonDecoder decoder = new JsonDecoder();
 
       callback(new StockData(decoder.convert(json)));
 
       if (_currentChunk < _kChunkCount)
         _fetchNextChunk();
     });
   }
 }