[CLEANUP beta] Remove Model deprecations

packages/ember-data/lib/system/model/model.js

@@ -101,34 +101,6 @@ var Model = Ember.Object.extend(Ember.Evented, {
 
     Example
 
-    ```javascript
-    var record = store.createRecord('model');
-    record.get('isDirty'); // true
-
-    store.find('model', 1).then(function(model) {
-      model.get('isDirty'); // false
-      model.set('foo', 'some value');
-      model.get('isDirty'); // true
-    });
-    ```
-
-    @property isDirty
-    @type {Boolean}
-    @readOnly
-    @deprecated
-  */
-  isDirty: Ember.computed('currentState.isDirty', function() {
-    Ember.deprecate('DS.Model#isDirty has been deprecated please use hasDirtyAttributes instead');
-    return this.get('currentState.isDirty');
-  }),
-  /**
-    If this property is `true` the record is in the `dirty` state. The
-    record has local changes that have not yet been saved by the
-    adapter. This includes records that have been created (but not yet
-    saved) or deleted.
-
-    Example
-
     ```javascript
     var record = store.createRecord('model');
     record.get('hasDirtyAttributes'); // true
@@ -661,28 +633,6 @@ var Model = Ember.Object.extend(Ember.Evented, {
   },
   */
 
-  /**
-    If the model `isDirty` this function will discard any unsaved
-    changes. If the model `isNew` it will be removed from the store.
-
-    Example
-
-    ```javascript
-    record.get('name'); // 'Untitled Document'
-    record.set('name', 'Doc 1');
-    record.get('name'); // 'Doc 1'
-    record.rollback();
-    record.get('name'); // 'Untitled Document'
-    ```
-
-    @method rollback
-    @deprecated Use `rollbackAttributes()` instead
-  */
-  rollback: function() {
-    Ember.deprecate('Using model.rollback() has been deprecated. Use model.rollbackAttributes() to discard any unsaved changes to a model.');
-    this.rollbackAttributes();
-  },
-
   /**
     If the model `isDirty` this function will discard any unsaved
     changes. If the model `isNew` it will be removed from the store.

packages/ember-data/tests/unit/model-test.js

@@ -893,23 +893,3 @@ test('accessing attributes in the initializer should not throw an error', functi
 
   run(() => store.createRecord('person'));
 });
-
-
-test('isDirty should log a deprecation warning', function() {
-  expect(1);
-  var Person = DS.Model.extend({
-    name: DS.attr('string')
-  });
-
-  var env = setupStore({
-    person: Person
-  });
-  var store = env.store;
-
-  run(function() {
-    var person = store.createRecord('person');
-    expectDeprecation(function() {
-      person.get('isDirty');
-    }, /DS.Model#isDirty has been deprecated/);
-  });
-});