net: lio_core: remove redundant assignment to variable tx_done

The variable tx_done is being assigned with a value that is never read
as the function returns a few statements later.  The assignment is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/cavium/liquidio/lio_core.c

@@ -782,7 +782,6 @@ static int liquidio_napi_poll(struct napi_struct *napi, int budget)
 	if ((work_done < budget && tx_done) ||
 	    (iq && iq->pkt_in_done >= MAX_REG_CNT) ||
 	    (droq->pkt_count >= MAX_REG_CNT)) {
-		tx_done = 1;
 		napi_complete_done(napi, work_done);
 
 		octeon_enable_irq(droq->oct_dev, droq->q_no);