Clean up a few static warnings.

utils/tests/pub/oauth2_test.dart

 // 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 oauth2_test;
 
 import 'dart:io';
 import 'dart:json' as json;
 import 'dart:uri';
 
 import 'test_pub.dart';
-import 'test_pub.dart';
 import '../../../pkg/http/lib/http.dart' as http;
 import '../../../pkg/unittest/lib/unittest.dart';
 import '../../pub/io.dart';
 import '../../pub/utils.dart';
 
 main() {
   setUp(() => normalPackage.scheduleCreate());
 
   integration('with no credentials.json, authenticates and saves '
       'credentials.json', () {
@@ skipping 182 matching lines @@
 
       response.headers.contentType = new ContentType("application", "json");
       response.outputStream.writeString(json.stringify({
         "access_token": accessToken,
         "token_type": "bearer"
       }));
       response.outputStream.close();
     });
   });
 }