Remove the unused operations queue

pkg/analysis_server/test/operation/test_all.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.
-
-import 'package:test_reflective_loader/test_reflective_loader.dart';
-
-import 'operation_queue_test.dart' as operation_queue_test;
-import 'operation_test.dart' as operation_test;
-
-/**
- * Utility for manually running all tests.
- */
-main() {
-  defineReflectiveSuite(() {
-    operation_queue_test.main();
-    operation_test.main();
-  }, name: 'operation');
-}