Get rid of all the library tags.

lib/src/command/global.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.
 
-library pub.command.global;
-
 import '../command.dart';
 import 'global_activate.dart';
 import 'global_deactivate.dart';
 import 'global_list.dart';
 import 'global_run.dart';
 
 /// Handles the `global` pub command.
 class GlobalCommand extends PubCommand {
   String get name => "global";
   String get description => "Work with global packages.";
   String get invocation => "pub global <subcommand>";
 
   GlobalCommand() {
     addSubcommand(new GlobalActivateCommand());
     addSubcommand(new GlobalDeactivateCommand());
     addSubcommand(new GlobalListCommand());
     addSubcommand(new GlobalRunCommand());
   }
 }