Make the analysis server integration tests driver only.

pkg/analysis_server/test/integration/search/find_top_level_declarations_test.dart

 // Copyright (c) 2017, 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:analysis_server/plugin/protocol/protocol.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../integration_tests.dart';
 
@@ skipping 31 matching lines @@
     expect(searchParams.id, declarationsResult.id);
     expect(searchParams.isLast, isTrue);
     expect(searchParams.results, isNotEmpty);
 
     SearchResult result = searchParams.results.first;
     expect(result.location.file, pathname);
     expect(result.isPotential, isFalse);
     expect(result.kind.name, SearchResultKind.DECLARATION.name);
     expect(result.path.first.name, 'qux');
   }
-
-  @override
-  bool get enableNewAnalysisDriver => true;
 }