scsi: core: Remove 'current_tag'

The 'current_tag' field in struct scsi_device is unused now; remove it.

Link: https://lore.kernel.org/r/1631696835-136198-4-git-send-email-john.garry@huawei.comReviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

include/scsi/scsi_device.h

@@ -146,7 +146,6 @@ struct scsi_device {
 	struct scsi_vpd __rcu *vpd_pg83;
 	struct scsi_vpd __rcu *vpd_pg80;
 	struct scsi_vpd __rcu *vpd_pg89;
-	unsigned char current_tag;	/* current tag */
 	struct scsi_target      *sdev_target;
 
 	blist_flags_t		sdev_bflags; /* black/white flags as also found in