scsi: qla2xxx: Remove unused del_sess_list field

"struct qla_tgt"->del_sess_list is no longer used since commit
726b8548 ("qla2xxx: Add framework for async fabric discovery").

Link: https://lore.kernel.org/r/0c335e86-5624-b599-5137-f1377419fb0c@I-love.SAKURA.ne.jpTested-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_target.c

@@ -6512,7 +6512,6 @@ int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
 	tgt->ha = ha;
 	tgt->vha = base_vha;
 	init_waitqueue_head(&tgt->waitQ);
-	INIT_LIST_HEAD(&tgt->del_sess_list);
 	spin_lock_init(&tgt->sess_work_lock);
 	INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
 	INIT_LIST_HEAD(&tgt->sess_works_list);

drivers/scsi/qla2xxx/qla_target.h

@@ -813,9 +813,6 @@ struct qla_tgt {
 	/* Count of sessions refering qla_tgt. Protected by hardware_lock. */
 	int sess_count;
 
-	/* Protected by hardware_lock */
-	struct list_head del_sess_list;
-
 	spinlock_t sess_work_lock;
 	struct list_head sess_works_list;
 	struct work_struct sess_work;