Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/src/util/yaml_test.dart

 // Copyright (c) 2015, 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 analyzer.src.test.util.yaml_test;
 
 import 'package:analyzer/src/util/yaml.dart';
 import 'package:test/test.dart';
 
-import '../../utils.dart';
-
 main() {
-  initializeTestEnvironment();
-
   group('yaml', () {
     group('merge', () {
       test('map', () {
         expect(
             merge({
               'one': true,
               'two': false,
               'three': {
                 'nested': {'four': true, 'six': true}
               }
@@ skipping 70 matching lines @@
         expect(merge(1, 'foo'), 'foo');
         expect(merge({'foo': 1}, 'foo'), 'foo');
       });
     });
   });
 }
 
 final Merger merger = new Merger();
 
 Object merge(Object o1, Object o2) => merger.merge(o1, o2);