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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def DeleteJob(self, job_id, token=None):
 """Deletes cron job with the given URN."""

    job_urn = self.CRON_JOBS_PATH.Add(job_id)
    aff4.FACTORY.Delete(job_urn, token=token)