RDMA/mlx4: remove redundant assignment to variable nreq

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

Link: https://lore.kernel.org/r/20220130225747.8114-1-colin.i.king@gmail.comSigned-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/mlx4/srq.c

@@ -320,7 +320,6 @@ int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
 	if (mdev->dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
 		err = -EIO;
 		*bad_wr = wr;
-		nreq = 0;
 		goto out;
 	}