nvme-pci: remove unused nvme_iod member

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/pci.c

@@ -220,7 +220,6 @@ struct nvme_iod {
 	int aborted;
 	int npages;		/* In the PRP list. 0 means small pool in use */
 	int nents;		/* Used in scatterlist */
-	int length;		/* Of data, in bytes */
 	dma_addr_t first_dma;
 	struct scatterlist meta_sg; /* metadata requires single contiguous buffer */
 	struct scatterlist *sg;
@@ -603,7 +602,6 @@ static blk_status_t nvme_init_iod(struct request *rq, struct nvme_dev *dev)
 	iod->aborted = 0;
 	iod->npages = -1;
 	iod->nents = 0;
-	iod->length = size;
 
 	return BLK_STS_OK;
 }