Get rid of all the library tags.

lib/src/asset/dart/transformer_isolate.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 pub.asset.transformer_isolate;
-
 import 'dart:convert';
 import 'dart:isolate';
 import 'dart:mirrors';
 
 import 'package:barback/barback.dart';
 
 import 'serialize.dart';
 
 /// The mirror system.
 ///
@@ skipping 75 matching lines @@
 }
 
 // TODO(nweiz): clean this up when issue 13248 is fixed.
 MethodMirror _getConstructor(ClassMirror classMirror, String constructor) {
   var name = new Symbol("${MirrorSystem.getName(classMirror.simpleName)}"
       ".$constructor");
   var candidate = classMirror.declarations[name];
   if (candidate is MethodMirror && candidate.isConstructor) return candidate;
   return null;
 }