Move pub into sdk/lib/_internal.

utils/pub/command_version.dart

Index: utils/pub/command_version.dart
diff --git a/utils/pub/command_version.dart b/utils/pub/command_version.dart
deleted file mode 100644
index 7c9ad636815ffd8fa9f7e0c387ce450db406abf8..0000000000000000000000000000000000000000
--- a/utils/pub/command_version.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// 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.
-
-library command_version;
-
-import 'dart:async';
-import 'pub.dart';
-
-/// Handles the `version` pub command. 
-class VersionCommand extends PubCommand {
-  String get description => 'Print pub version.';
-  String get usage => 'pub version';
-  bool get requiresEntrypoint => false;
-
-  Future onRun() {
-    printVersion();
-  }
-}