Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/generated/java_core_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.generated.java_core_test;
 
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:test/test.dart';
 
-import '../utils.dart';
-
 main() {
-  initializeTestEnvironment();
   group('Character', () {
     group('isLetter', () {
       test('digits', () {
         expect(Character.isLetter('0'.codeUnitAt(0)), isFalse);
         expect(Character.isLetter('1'.codeUnitAt(0)), isFalse);
         expect(Character.isLetter('9'.codeUnitAt(0)), isFalse);
       });
 
       test('letters', () {
         expect(Character.isLetter('a'.codeUnitAt(0)), isTrue);
@@ skipping 30 matching lines @@
 
       test('other', () {
         expect(Character.isLetterOrDigit(' '.codeUnitAt(0)), isFalse);
         expect(Character.isLetterOrDigit('.'.codeUnitAt(0)), isFalse);
         expect(Character.isLetterOrDigit('-'.codeUnitAt(0)), isFalse);
         expect(Character.isLetterOrDigit('+'.codeUnitAt(0)), isFalse);
       });
     });
   });
 }