code: def remove_role_requests(cursor, uuid_, roles):
      
      if not isinstance(roles, (list, set, tuple,)):
          raise TypeError("``roles`` is an invalid type: {}".format(type(roles)))
  
      acceptors = set([(x['uid'], x['role'],) for x in roles])
  
      # Remove the the entries.
      for uid, role_type in acceptors:
          cursor.execute("""\
  DELETE FROM role_acceptances
  WHERE uuid = %s AND user_id = %s AND role_type = %s""",
                         (uuid_, uid, role_type,))
docs: Given a ``uuid`` and list of dicts containing the ``uid``
      (user identifiers) and ``role`` for removal of the identified
      users' role acceptance entries.