scsi_transport_iscsi: Remove set-but-not-used variables

Avoid that building with W=1 causes gcc to report warnings about
set-but-not-used variables.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/scsi_transport_iscsi.c

@@ -2070,13 +2070,10 @@ EXPORT_SYMBOL_GPL(iscsi_alloc_session);
 
 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 {
-	struct Scsi_Host *shost = iscsi_session_to_shost(session);
-	struct iscsi_cls_host *ihost;
 	unsigned long flags;
 	int id = 0;
 	int err;
 
-	ihost = shost->shost_data;
 	session->sid = atomic_add_return(1, &iscsi_session_nr);
 
 	if (target_id == ISCSI_MAX_TARGET) {