net: Remove the DEBUGASSERT of the same event of the same fd in tcp_pollsetup.

In libuv, if the real_timeout in the uv__io_poll is less than 0, the poll logic will be entered directly by the uv__run_timers, which will trigger the ASSERT.
It seems that the situation of first epoll and then poll for the same fd is used in libuv.

Signed-off-by: liqinhui <[email protected]>

Author: liqinhuixm

net/tcp/tcp_netpoll.c

@@ -230,7 +230,6 @@ int tcp_pollsetup(FAR struct socket *psock, FAR struct pollfd *fds)
   info = conn->pollinfo;
   while (info->conn != NULL)
     {
-      DEBUGASSERT((fds->events & info->fds->events) != 0);
       if (++info >= &conn->pollinfo[CONFIG_NET_TCP_NPOLLWAITERS])
         {
           DEBUGPANIC();