scsi: fc: drop residual tsk_mgmt_response and it_nexus_response

After commit 556e26a70b64 ("scsi: remove tsk_mgmt_response and
it_nexus_response transport methods"), the target driver support was
removed totally. Drop the residual.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

include/scsi/scsi_transport_fc.h

@@ -658,10 +658,6 @@ struct fc_function_template {
 	int	(*vport_disable)(struct fc_vport *, bool);
 	int  	(*vport_delete)(struct fc_vport *);
 
-	/* target-mode drivers' functions */
-	int     (* tsk_mgmt_response)(struct Scsi_Host *, u64, u64, int);
-	int     (* it_nexus_response)(struct Scsi_Host *, u64, int);
-
 	/* bsg support */
 	int	(*bsg_request)(struct bsg_job *);
 	int	(*bsg_timeout)(struct bsg_job *);