Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart

Index: sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart b/sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart
deleted file mode 100644
index 72fbc9724ad3ebe71ca2cb03b6fa9516d5bcf6bf..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/global/activate/missing_package_arg_test.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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.
-
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../../../lib/src/exit_codes.dart' as exit_codes;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration('fails if no package was given', () {
-    schedulePub(args: ["global", "activate"],
-        error: contains("No package to activate given."),
-        exitCode: exit_codes.USAGE);
-  });
-}