Get rid of all the library tags.

test/test_util.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_util;
-
 import 'dart:async';
 
 import 'package:path/path.dart' as p;
 import 'package:shelf/shelf.dart';
 import 'package:shelf_static/src/util.dart';
 import 'package:test/test.dart';
 
 final p.Context _ctx = p.url;
 
 /// Makes a simple GET request to [handler] and returns the result.
@@ skipping 39 matching lines @@
   }
 
   Description describe(Description descirption) => descirption.add(
       'Must be at the same moment as $_target with resolution '
       'to the second.');
 }
 
 bool datesEqualToSecond(DateTime d1, DateTime d2) {
   return toSecondResolution(d1).isAtSameMomentAs(toSecondResolution(d2));
 }