Method remove

3rdparty/cppzmq/zmq.hpp:2696–2701

    void add(fd_t fd, event_flags events) { add_impl(fd, events, nullptr); }

    void remove(zmq::socket_ref socket)
    {
        if (0 != zmq_poller_remove(poller_ptr.get(), socket.handle())) {
            throw error_t();
        }
    }

    void remove(fd_t fd)
    {