io_uring/net: remove (now) dead code in io_netmsg_recycle()

All net commands have async data at this point, there's no reason to
check if this is the case or not.
Signed-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/net.c

@@ -119,7 +119,7 @@ static void io_netmsg_recycle(struct io_kiocb *req, unsigned int issue_flags)
 {
 	struct io_async_msghdr *hdr = req->async_data;
 
-	if (!req_has_async_data(req) || issue_flags & IO_URING_F_UNLOCKED)
+	if (unlikely(issue_flags & IO_URING_F_UNLOCKED))
 		return;
 
 	/* Let normal cleanup path reap it if we fail adding to the cache */