Get rid of all the library tags.

lib/src/backend/live_test.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 test.backend.live_test;
-
 import 'dart:async';
 
 import 'group.dart';
 import 'state.dart';
 import 'suite.dart';
 import 'test.dart';
 
 /// A runnable instance of a test.
 ///
 /// This is distinct from [Test] in order to keep [Test]. Running a test
@@ skipping 123 matching lines @@
   ///
   /// This doesn't automatically happen after the test completes because there
   /// may be more asynchronous work going on in the background that could
   /// produce new errors.
   ///
   /// Returns a [Future] that completes once all resources are released *and*
   /// the test has completed. This allows the caller to wait until the test's
   /// tear-down logic has run.
   Future close();
 }