Remove more references to AnalysisContext

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

-// Copyright (c) 2015, 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 'library_dependencies_test.dart' as library_dependencies;
-import 'reachable_source_collector_test.dart' as reachable_source_collector;
-
-/// Utility for manually running all tests.
-main() {
-  defineReflectiveSuite(() {
-    library_dependencies.main();
-    reachable_source_collector.main();
-  }, name: 'dependencies');
-}