RDMA/rxe: Remove the unused xmit_errors member

The member variable xmit_errors can be replaced with

rxe_counter_inc(rxe, RXE_CNT_SEND_ERR)

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Zhu Yanjun <[e-mail]>
Reviewed-by: Leon Romanovsky <[e-mail]>
Signed-off-by: Jason Gunthorpe <[e-mail]>

drivers/infiniband/sw/rxe/rxe_net.c

···
 	else
 		err = rxe_send(skb, pkt);
 	if (err) {
-		rxe->xmit_errors++;
 		rxe_counter_inc(rxe, RXE_CNT_SEND_ERR);
 		return err;
 	}

drivers/infiniband/sw/rxe/rxe_verbs.h

···
 
 	struct net_device	*ndev;
 
-	int			xmit_errors;
-
 	struct rxe_pool		uc_pool;
 	struct rxe_pool		pd_pool;
 	struct rxe_pool		ah_pool;