Get rid of all the library tags.

test/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.
 
-library shelf_static.test_all;
-
 import 'package:scheduled_test/scheduled_test.dart';
 
 import 'alternative_root_test.dart' as alternative_root;
 import 'basic_file_test.dart' as basic_file;
 import 'default_document_test.dart' as default_document;
 import 'directory_listing_test.dart' as directory_listing;
 import 'get_handler_test.dart' as get_handler;
 import 'sample_test.dart' as sample;
 import 'symbolic_link_test.dart' as symbolic_link;
 
 void main() {
   group('alternative_root', alternative_root.main);
   group('basic_file', basic_file.main);
   group('default_document', default_document.main);
   group('directory_listing', directory_listing.main);
   group('get_handler', get_handler.main);
   group('sample', sample.main);
   group('symbolic_link', symbolic_link.main);
 }