scsi: qedi: Remove redundant flush_workqueue() calls

destroy_workqueue() already drains the queue before destroying it, so there
is no need to flush it explicitly.

Remove the redundant flush_workqueue() calls.

Link: https://lore.kernel.org/r/20220127013934.1184923-1-chi.minghao@zte.com.cnReported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qedi/qedi_main.c

@@ -2418,13 +2418,11 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
 		iscsi_host_remove(qedi->shost);
 
 		if (qedi->tmf_thread) {
-			flush_workqueue(qedi->tmf_thread);
 			destroy_workqueue(qedi->tmf_thread);
 			qedi->tmf_thread = NULL;
 		}
 
 		if (qedi->offload_thread) {
-			flush_workqueue(qedi->offload_thread);
 			destroy_workqueue(qedi->offload_thread);
 			qedi->offload_thread = NULL;
 		}