code: async function clear(promise) {
      if (!pendingPromises.has(promise)) {
        return Promise.reject(new YError('E_BAD_DELAY'));
      }
      const { timeoutId, reject } = pendingPromises.get(promise);
  
      clearTimeout(timeoutId);
      reject(new YError('E_DELAY_CLEARED'));
      pendingPromises.delete(promise);
      log('debug', 'Cleared a delay');
    }
docs: Cancel an earlier created delay
  @param  {Promise}   promise
  The promise of the delay to cancel
  @return {Promise}
  A promise resolved when cancellation is done.
  @example
  try {
  const delayPromise = delay.create(1000);
  await Promise.all(delayPromise, delay.clear(delayPromise));
  console.log('1000 ms elapsed!');
  } catch (err) {
  if(err.code != 'E_DELAY_CLEARED') {
  trow err;
  }
  console.log('Cancelled!'));
  }
  // Prints: Cancelled!