Use the new test runner.

test/global/deactivate/deactivate_and_reactivate_package_test.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.
 
 import '../../test_pub.dart';
 
 main() {
-  initConfig();
   integration('activates a different version after deactivating', () {
     servePackages((builder) {
       builder.serve("foo", "1.0.0");
       builder.serve("foo", "2.0.0");
     });
 
     // Activate an old version.
     schedulePub(args: ["global", "activate", "foo", "1.0.0"]);
 
     schedulePub(args: ["global", "deactivate", "foo"],
         output: "Deactivated package foo 1.0.0.");
 
     // Activating again should forget the old version.
     schedulePub(args: ["global", "activate", "foo"], output: """
         Resolving dependencies...
         + foo 2.0.0
         Downloading foo 2.0.0...
         Precompiling executables...
         Loading source assets...
         Activated foo 2.0.0.""");
   });
 }