async function destroyEvent(selector) {
  const calendarEvent = await db.CalendarEvent.findOne({
    where: {
      selector,
    },
  });

  if (calendarEvent === null) {
    throw new NotFoundError('CalendarEvent not found');
  }

  await calendarEvent.destroy();
}
@description Delete a calendar event.
@param {string} selector - CalendarEvent selector.
@example
gladys.calendar.destroyEvent('my-event');