remove invalid filter test

tests/integration/filter-test.js

@@ -578,37 +578,6 @@ test('it is possible to filter created records by dirtiness', function(assert) {
   });
 });
 
-test('it is possible to filter created records by isReloading', function(assert) {
-  customAdapter(env, DS.Adapter.extend({
-    findRecord(store, type, id, snapshot) {
-      return {
-        data: {
-          id: 1,
-          type: 'person',
-          attributes: {
-            name: 'Tom Dalle'
-          }
-        }
-      };
-    }
-  }));
-
-  let filter = store.filter('person', person => {
-    return !person.get('isReloading');
-  });
-
-  let person = store.createRecord('person', {
-    id: '1',
-    name: 'Tom Dale'
-  });
-
-  return run(() => {
-    return person.reload().then(person => {
-      assert.equal(filter.get('length'), 1, 'the filter correctly returned a reloaded object');
-    });
-  });
-});
-
 // SERVER SIDE TESTS
 let edited;