Clean up

test/playwright/MouseTracking.test.ts

@@ -3,8 +3,6 @@
  * @license MIT
  */
 import { test } from '@playwright/test';
-import { deepStrictEqual, ok, strictEqual } from 'assert';
-import type { IDisposable } from '@xterm/xterm';
 import { createTestContext, ITestContext, openTerminal, pollFor } from './TestUtils';
 
 let ctx: ITestContext;