tests: minor cleanup (#35138)

* tests: minor cleanup

* tests: use the util noop function

js/tests/unit/tooltip.spec.js

@@ -1,8 +1,6 @@
 import Tooltip from '../../src/tooltip'
 import EventHandler from '../../src/dom/event-handler'
 import { noop } from '../../src/util/index'
-
-/** Test helpers */
 import { clearFixture, createEvent, getFixture, jQueryMock } from '../helpers/fixture'
 
 describe('Tooltip', () => {