Remove 'initializeTestEnvironment' from 'analysis_server'.

pkg/analysis_server/test/services/completion/dart/test_all.dart

Index: pkg/analysis_server/test/services/completion/dart/test_all.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/test_all.dart b/pkg/analysis_server/test/services/completion/dart/test_all.dart
index 0493001289cc7829ead5477ddb045fe11af0bfb7..8fa0c51160984a8df39fd147b2bb067b9efbb919 100644
--- a/pkg/analysis_server/test/services/completion/dart/test_all.dart
+++ b/pkg/analysis_server/test/services/completion/dart/test_all.dart
@@ -6,7 +6,6 @@ library test.services.completion.dart;
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../../../utils.dart';
 import 'arglist_contributor_test.dart' as arglist_test;
 import 'combinator_contributor_test.dart' as combinator_test;
 import 'common_usage_sorter_test.dart' as common_usage_test;
@@ -32,7 +31,6 @@ import 'variable_name_contributor_test.dart' as variable_name_contributor_test;
 
 /// Utility for manually running all tests.
 main() {
-  initializeTestEnvironment();
   defineReflectiveSuite(() {
     arglist_test.main();
     combinator_test.main();