scsi: fnic: Remove unused functions fnic_scsi_host_start/end_tag()

scsi: fnic: Remove unused functions fnic_scsi_host_start/end_tag()

The functions fnic_scsi_host_start_tag() and fnic_scsi_host_end_tag() are
not used anywhere, so remove them.

silence the warnings:
drivers/scsi/fnic/fnic_scsi.c:2175:1: warning: unused function 'fnic_scsi_host_start_tag'
drivers/scsi/fnic/fnic_scsi.c:2196:1: warning: unused function 'fnic_scsi_host_end_tag'

Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230829010222.33393-1-yang.lee@linux.alibaba.com
Acked-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>