Archive function for particular personal or training units

When you have set up training in the system and people have completed the training, but have changed role and no longer require refresher training there is no way of archiving that persons training record for the training unit so instead it shows as expired until such time that person leaves the business or the complete refresher training. It would be great to be able to archive them so the training evidence is still in the system but not physically visible. Alternatively being able to delete very old records would also be helpful. This is important especially for KPI reporting for training and overdue training.