.cookies.delete() 建議編輯

                    .cookies.delete(cookieName, [callback])
                

module.exports = {
  'delete a cookie': function (browser) {
    browser
      .cookies.delete('test_cookie', function () {
        console.log('cookie deleted successfully');
      });
  },

  'delete a cookie with ES6 async/await': async function (browser) {
    await browser.cookies.delete('test_cookie');
  }
};