cxgb4: remove redundant assignment to hdr_len

Variable hdr_len is being assigned a value that is never read.
The assignment is redundant and hence can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb4/sge.c

@@ -3810,7 +3810,6 @@ int cxgb4_ethofld_rx_handler(struct sge_rspq *q, const __be64 *rsp,
 				      eosw_txq->state ==
 				      CXGB4_EO_STATE_FLOWC_CLOSE_REPLY) &&
 				     eosw_txq->cidx == eosw_txq->flowc_idx)) {
-				hdr_len = skb->len;
 				flits = DIV_ROUND_UP(skb->len, 8);
 				if (eosw_txq->state ==
 				    CXGB4_EO_STATE_FLOWC_OPEN_REPLY)