Get rid of all the library tags.

lib/src/frontend/timeout.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.frontend.timeout;
-
 /// A class representing a modification to the default timeout for a test.
 ///
 /// By default, a test will time out after 30 seconds. With [new Timeout], that
 /// can be overridden entirely; with [new Timeout.factor], it can be scaled
 /// relative to the default.
 class Timeout {
   /// A constant indicating that a test should never time out.
   static const none = const Timeout._none();
 
   /// The timeout duration.
@@ skipping 36 matching lines @@
   }
 
   /// Returns a new [Duration] from applying [this] to [base].
   ///
   /// If this is [none], returns `null`.
   Duration apply(Duration base) {
     if (this == none) return null;
     return duration == null ? base * scaleFactor : duration;
   }
 }