Use the new test runner.

test/global/activate/constraint_with_path_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 'package:pub/src/exit_codes.dart' as exit_codes;
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../../test_pub.dart';
 
 main() {
-  initConfig();
   integration('fails if a version is passed with the path source', () {
     schedulePub(args: ["global", "activate", "-spath", "foo", "1.2.3"],
         error: contains('Unexpected argument "1.2.3".'),
         exitCode: exit_codes.USAGE);
   });
 }