code: def delete_keyring(service):
      
      keyring = _keyring_path(service)
      if not os.path.exists(keyring):
          log('Keyring does not exist at %s' % keyring, level=WARNING)
          return
  
      os.remove(keyring)
      log('Deleted ring at %s.' % keyring, level=INFO)
docs: Delete an existing Ceph keyring.