socket: Remove redundant code

Signed-off-by: Tilo Eckert <tilo.eckert@flam.de>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

src/socket.c

@@ -274,9 +274,6 @@ int ssh_socket_pollcallback(struct ssh_poll_handle_struct *p,
             return -2;
         }
         if (nread == 0) {
-            if (p != NULL) {
-                ssh_poll_remove_events(p, POLLIN);
-            }
             if (p != NULL) {
                 ssh_poll_remove_events(p, POLLIN);
             }