nvme: remove a misleading comment on struct nvme_ns

While a NVMe Namespace is somewhat similar to a SCSI Logical Unit (and not
a Logical Unit Number anyway) there are subtile differences. Remove the
misleading comment.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Sagi Grimberg <[e-mail]>
Reviewed-by: Johannes Thumshirn <[e-mail]>
Reviewed-by: Max Gurtovoy <[e-mail]>
Signed-off-by: Sagi Grimberg <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/nvme/host/nvme.h

···
 	struct nvmf_ctrl_options *opts;
 };
 
-/*
- * An NVM Express namespace is equivalent to a SCSI LUN
- */
 struct nvme_ns {
 	struct list_head list;