code: def delete(self, mail):
          
          self.stats['mail_deleted'] += 1
          if self.conf.dry_run:
              logger.info("Skip deletion of {!r}.".format(mail))
              return
  
          logger.debug("Deleting {!r}...".format(mail))
          # XXX Investigate the use of maildir's .remove instead. See: https:
          # //github.com/python/cpython/blob/origin/2.7/Lib/mailbox.py#L329-L331
          os.unlink(mail.path)
          logger.info("{} deleted.".format(mail.path))
docs: Delete a mail from the filesystem.