remove unused import

src/components/tooltip/tooltip.test.ts

@@ -1,7 +1,6 @@
 import '../../../dist/shoelace.js';
 import { expect, fixture, html, waitUntil } from '@open-wc/testing';
 import sinon from 'sinon';
-import type SlPopup from '../popup/popup';
 import type SlTooltip from './tooltip';
 
 describe('<sl-tooltip>', () => {