Remove 'initializeTestEnvironment' from 'analyzer'.

pkg/analyzer/test/source/test_all.dart

Index: pkg/analyzer/test/source/test_all.dart
diff --git a/pkg/analyzer/test/source/test_all.dart b/pkg/analyzer/test/source/test_all.dart
index 439c98f57b45fa170407ffd6e0880a09b112fe9f..98f3cde7003878b76bf70990064f433dd87a45c7 100644
--- a/pkg/analyzer/test/source/test_all.dart
+++ b/pkg/analyzer/test/source/test_all.dart
@@ -6,7 +6,6 @@ library analyzer.test.source.test_all;
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../utils.dart';
 import 'analysis_options_provider_test.dart' as analysis_options_provider_test;
 import 'config_test.dart' as config_test;
 import 'embedder_test.dart' as embedder_test;
@@ -18,7 +17,6 @@ import 'sdk_ext_test.dart' as sdk_ext_test;
 
 /// Utility for manually running all tests.
 main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     analysis_options_provider_test.main();
     config_test.main();