Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/src/context/context_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 analyzer.test.src.context.context_test;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 23 matching lines @@
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:watcher/src/utils.dart';
 
 import '../../generated/engine_test.dart';
 import '../../generated/test_support.dart';
 import '../../utils.dart';
 import 'abstract_context.dart';
 
 main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     defineReflectiveTests(AnalysisContextImplTest);
     defineReflectiveTests(LimitedInvalidateTest);
   });
 }
 
 @reflectiveTest
 class AnalysisContextImplTest extends AbstractContextTest {
   void fail_getErrors_html_some() {
     Source source = addSource(
@@ skipping 5216 matching lines @@
    * Initialize the visitor.
    */
   _ElementGatherer();
 
   @override
   void visitElement(Element element) {
     elements[element] = element;
     super.visitElement(element);
   }
 }