pkg: analysis aided cleanup

pkg/scheduled_test/lib/src/descriptor/descriptor.dart

 // Copyright (c) 2013, 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 descriptor.descriptor;
 
 import 'dart:async';
 
-import '../utils.dart';
-
 /// The base class for various declarative descriptions of filesystem entries.
 /// All asynchronous operations on descriptors are [schedule]d unless otherwise
 /// noted.
 abstract class Descriptor {
   /// The name of this entry.
   final String name;
 
   Descriptor(this.name);
 
   /// Schedules the creation of the described entry within the [parent]
@@ skipping 34 matching lines @@
 
 /// An interface for descriptors whose contents can be read.
 abstract class ReadableDescriptor implements Descriptor {
   /// Returns the contents of [this] as a stream. This only works if [this] is a
   /// file entry. This operation is not [schedule]d.
   ///
   /// All errors in loading the file will be passed through the returned
   /// [Stream].
   Stream<List<int>> read();
 }