Remove 'initializeTestEnvironment' from 'analysis_server'.

pkg/analysis_server/test/context_manager_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.
 
 library test.context.directory.manager;
 
 import 'dart:collection';
 
 import 'package:analysis_server/src/context_manager.dart';
 import 'package:analyzer/error/error.dart';
@@ skipping 14 matching lines @@
 import 'package:linter/src/plugin/linter_plugin.dart';
 import 'package:linter/src/rules/avoid_as.dart';
 import 'package:path/path.dart';
 import 'package:plugin/manager.dart';
 import 'package:plugin/plugin.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'mock_sdk.dart';
 import 'mocks.dart';
-import 'utils.dart';
 
 main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     defineReflectiveTests(AbstractContextManagerTest);
     defineReflectiveTests(ContextManagerWithNewOptionsTest);
     defineReflectiveTests(ContextManagerWithOldOptionsTest);
   });
 }
 
 @reflectiveTest
 class AbstractContextManagerTest extends ContextManagerTest {
   void test_contextsInAnalysisRoot_nestedContext() {
@@ skipping 2709 matching lines @@
 class TestUriResolver extends UriResolver {
   Map<Uri, Source> uriMap;
 
   TestUriResolver(this.uriMap);
 
   @override
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     return uriMap[uri];
   }
 }