Remove "pub list" command.

utils/pub/pub.dart

 // Copyright (c) 2012, 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.
 
 /**
  * The main entrypoint for the pub command line application.
  */
 #library('pub');
 
 #import('../../pkg/args/lib/args.dart');
 #import('dart:io');
 #import('dart:math');
 #import('io.dart');
 #import('command_help.dart');
 #import('command_install.dart');
-#import('command_list.dart');
 #import('command_update.dart');
 #import('command_version.dart');
 #import('entrypoint.dart');
 #import('exit_codes.dart', prefix: 'exit_codes');
 #import('git_source.dart');
 #import('hosted_source.dart');
 #import('package.dart');
 #import('pubspec.dart');
 #import('sdk_source.dart');
 #import('source.dart');
 #import('source_registry.dart');
 #import('system_cache.dart');
 #import('utils.dart');
 #import('version.dart');
 
 Version get pubVersion => new Version(0, 0, 0);
 
 /**
  * The commands that Pub understands.
  */
 Map<String, PubCommand> get pubCommands => {
   'help': new HelpCommand(),
-  'list': new ListCommand(),
   'install': new InstallCommand(),
   'update': new UpdateCommand(),
   'version': new VersionCommand()
 };
 
 /**
  * The parser for arguments that are global to Pub rather than specific to a
  * single command.
  */
 ArgParser get pubArgParser {
@@ skipping 214 matching lines @@
     if (exception is HttpException || exception is HttpParserException ||
         exception is SocketIOException || exception is PubHttpException) {
       return exit_codes.UNAVAILABLE;
     } else if (exception is FormatException) {
       return exit_codes.DATA;
     } else {
       return 1;
     }
   }
 }