docs: def delete_job(job_id, connection=None):
      """Deletes a job.
  
      :param job_id: unique identifier for this job
  
      >>> delete_job('http://example.com/test')
      """
      if connection is None:
          connection = r
      with connection.pipeline() as pipe:
          pipe.delete(job_key(job_id))
          pipe.zrem(REDIS_KEY, job_id)
          pipe.execute()