Removed unused request_decorators

    SPECIAL_MESSAGE = {'special': None}

    def __init__(self, connection, label, handler=None, on_disconnect=None,

                 request_decorator=None, timeout=30, *args, **kwargs):

                 timeout=30, *args, **kwargs):

        super(RpcProtocol, self).__init__(connection, label, *args, **kwargs)

        self._handler = handler

        self._on_disconnect = on_disconnect

        self.request_decorator = request_decorator

        self._call_timeout = timeout

        # Store all calls sent to the peer. Key is the id of the call and value