Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/src/source/source_resource_test.dart

 // Copyright (c) 2016, 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.test.src.source.source_resource_test;
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/generated/java_engine_io.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
 import 'package:analyzer/src/source/source_resource.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../../utils.dart';
 import '../context/mock_sdk.dart';
 
 main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     defineReflectiveTests(FileSourceTest);
   });
 }
 
 @reflectiveTest
 class FileSourceTest {
   MemoryResourceProvider resourceProvider = new MemoryResourceProvider();
 
   void test_equals_false_differentFiles() {
@@ skipping 168 matching lines @@
     FileSource source = new FileSource(file, Uri.parse("dart:core"));
     expect(source, isNotNull);
     expect(source.fullName, file.path);
     expect(source.isInSystemLibrary, isTrue);
   }
 
   DartSdk _createSdk() {
     return new MockSdk(resourceProvider: resourceProvider);
   }
 }