Remove utils/archive. It is not used at this point.

utils/archive/options.dart

-// Copyright (c) 2012, 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 options;
-
-/**
- * An individual option.
- */
-class ArchiveOption {
-  /** The name of the option. */
-  final String name;
-
-  /** The value of the option. */
-  final value;
-
-  /** The module to which the option applies.*/
-  String module;
-
-  ArchiveOption(this.name, this.value, [this.module]);
-}
-
-/**
- * A collection of options.
- */
-class ArchiveOptions {
-  /** The internal options map. */
-  final Map<String, ArchiveOption> _options;
-
-  ArchiveOptions() : _options = <String, ArchiveOption>{};
-
-  /** Returns whether any options have been set. */
-  bool get isEmpty => _options.isEmpty;
-
-  /**
-   * Sets an option. [value] should either be a bool or something with a
-   * reasonable `toString` method.
-   *
-   * To set the module for an option, use [operator[]].
-   */
-  void operator[]=(String name, value) {
-    _options[name] = new ArchiveOption(name, value);
-  }
-
-  /** Gets the option with the given name. */
-  ArchiveOption operator[](String name) {
-    return _options[name];
-  }
-
-  /** Gets all options. */
-  List<ArchiveOption> get all => _options.values.toList();
-}