Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/cancelable_future_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.cancelable_future_test;
 
 import 'dart:async';
 
 import 'package:analyzer/src/cancelable_future.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:watcher/src/utils.dart';
 
-import 'utils.dart';
-
 void main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     defineReflectiveTests(CancelableCompleterTests);
     defineReflectiveTests(CancelableFutureTests);
   });
 }
 
 @reflectiveTest
 class CancelableCompleterTests {
   CancelableCompleter<Object> completer;
   int cancelCount = 0;
@@ skipping 394 matching lines @@
 
   Future test_value() {
     Object obj = new Object();
     return new CancelableFuture.value(obj).then((result) {
       expect(result, same(obj));
     }, onError: (error) {
       fail('Expected successful completion');
     });
   }
 }