Remove 'initializeTestEnvironment' from 'analysis_server'.

pkg/analysis_server/test/operation/operation_test.dart

Index: pkg/analysis_server/test/operation/operation_test.dart
diff --git a/pkg/analysis_server/test/operation/operation_test.dart b/pkg/analysis_server/test/operation/operation_test.dart
index 1c73c8b5814c502bb01e38b7332e8b7cfe35472d..5161c16ba12defb606156dff8f8580e77699a451 100644
--- a/pkg/analysis_server/test/operation/operation_test.dart
+++ b/pkg/analysis_server/test/operation/operation_test.dart
@@ -7,11 +7,7 @@ library test.operation;
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:test/test.dart';
 
-import '../utils.dart';
-
 main() {
-  initializeTestEnvironment();
-
   group('ServerOperationPriority', () {
     test('toString', () {
       expect(ServerOperationPriority.ANALYSIS.toString(), 'ANALYSIS');