Get rid of all the library tags.

lib/pool.dart

 // Copyright (c) 2014, 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 pool;
-
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:async/async.dart';
 import 'package:stack_trace/stack_trace.dart';
 
 /// Manages an abstract pool of resources with a limit on how many may be in use
 /// at once.
 ///
 /// When a resource is needed, the user should call [request]. When the returned
@@ skipping 240 matching lines @@
   /// produce additional information later on. For example, an isolate's task
   /// may be complete, but it could still emit asynchronous errors.
   void allowRelease(onRelease()) {
     if (_released) {
       throw new StateError("A PoolResource may only be released once.");
     }
     _released = true;
     _pool._onResourceReleaseAllowed(onRelease);
   }
 }