Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/src/task/general_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.test.src.task.general_test;
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/task/general.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/model.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:typed_mock/typed_mock.dart';
 
 import '../../generated/test_support.dart';
-import '../../utils.dart';
 
 main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     defineReflectiveTests(GetContentTaskTest);
   });
 }
 
 @reflectiveTest
 class GetContentTaskTest extends EngineTestCase {
   test_buildInputs() {
     AnalysisTarget target = new TestSource();
     Map<String, TaskInput> inputs = GetContentTask.buildInputs(target);
@@ skipping 45 matching lines @@
     when(context.getContents(target)).thenThrow('My exception!');
     task.perform();
     expect(task.caughtException, isNull);
     expect(task.outputs, hasLength(2));
     expect(task.outputs[CONTENT], '');
     expect(task.outputs[MODIFICATION_TIME], -1);
   }
 }
 
 class _MockContext extends TypedMock implements AnalysisContext {}