Remove service-compiler related code.

samples/simple_todo/todo_model.dart

-// Copyright (c) 2015, the Dartino 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.md file.
-
-library todomvc.todo_model;
-
-// Very simple model for a collection of TODO items.
-
-class Item {
-  String title;
-  bool _done = false;
-  int _id;
-
-  static int id_pool = 0;
-
-  Item(this.title) {
-    _id = id_pool++;
-  }
-
-  bool get done => _done;
-  void complete() { _done = true; }
-  void uncomplete() { _done = false; }
-  int get id => _id;
-}
-
-class TodoModel {
-  Map<int, Item> todos;
-
-  TodoModel() : todos = new Map<int, Item>();
-
-  void createItem(String title) {
-    assert(title.isNotEmpty);
-    Item item = new Item(title);
-    todos.putIfAbsent( item.id, () => item );
-  }
-
-  void deleteItem(int id) {
-    if (todos.containsKey(id)) {
-      todos.remove(id);
-    }
-  }
-
-  void completeItem(int id) {
-    if (todos.containsKey(id)) {
-      todos[id].complete();
-    }
-  }
-
-  void uncompleteItem(int id) {
-    if (todos.containsKey(id)) {
-      todos[id].uncomplete();
-    }
-  }
-
-  void clearItems() {
-    List<int> toDelete = new List<int>();
-
-    todos.forEach((k,v) {
-      if (v.done) {
-        toDelete.add(k);
-      }
-    });
-
-    toDelete.forEach((key) {
-      todos.remove(key);
-    });
-  }
-
-}