qla4xxx does not use iscsi_scan_finished() anymore so remove it.

Link: https://lore.kernel.org/r/20220226230435.38733-4-michael.christie@oracle.comReviewed-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>