code: def remove_acl(cursor, uuid_, permissions):
      
      if not isinstance(permissions, (list, set, tuple,)):
          raise TypeError("``permissions`` is an invalid type: {}"
                          .format(type(permissions)))
  
      permissions = set(permissions)
  
      # Remove the the entries.
      for uid, permission in permissions:
          cursor.execute("""\
  DELETE FROM document_acl
  WHERE uuid = %s AND user_id = %s AND permission = %s""",
                         (uuid_, uid, permission,))
docs: Given a ``uuid`` and a set of permissions given as a tuple
      of ``uid`` and ``permission``, remove these entries from the database.