remove serialization. it's moved to github

pkg/serialization/test/test_models.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.
-
-/** Provides some basic model classes to test serialization. */
-
-part of serialization_test;
-
-class Person {
-  String name, rank, serialNumber;
-  var address;
-}
-
-class Address {
-  String street, city, state, zip;
-  Address();
-  Address.withData(this.street, this.city, this.state, this.zip);
-}
-
-class Various {
-  Various.Foo(this._d, this.e);
-
-  // Field
-  var a;
-
-  // Get/Set pair
-  var _b;
-  get b => _b;
-  set b(value) { _b = value; }
-
-  // Private field (shouldn't be visible)
-  var _c = 'default value';
-
-  // Getter, value is set in the constructor
-  var _d;
-  get d => _d;
-
-  // Final, value set is the constructor.
-  final e;
-
-  // Get without corresponding set
-  get aLength => a.length;
-
-  static String thisShouldBeIgnored = "because it's static";
-  static get thisShouldAlsoBeIgnored => "for the same reason";
-  static set thisShouldAlsoBeIgnored(x) {}
-}
-
-class Node {
-  Node parent;
-  String name;
-  Node(this.name);
-  Node.parentEssential(this.parent);
-  List<Node> children;
-  bool someBoolean = true;
-
-  toString() => "Node($name)";
-}
-
-class NodeEqualByName extends Node {
-  NodeEqualByName(name) : super(name);
-  operator ==(x) => x is NodeEqualByName && name == x.name;
-  get hashCode => name.hashCode;
-}
-
-class Stream {
-  // In a real stream the position wouldn't likely be settable, making
-  // this trickier to reconstruct.
-  List _collection;
-  int position = 0;
-  Stream(this._collection);
-
-  next() => atEnd() ? null : _collection[position++];
-  atEnd() => position >= _collection.length;
-}