How do you say ‘Let bygones, be bygones’ in different languages?

More boring in Greek: περασμένα ξεχασμένα, “passed, forgotten”.

Edit: And because it’s ear-worming me, the song with that title by Katy Garbi. If it sounds Arabic, that’s correct: it’s a cover of an Egyptian original. Ελληνοαραβικός «πόλεμος» για τραγούδι της Καίτης Γαρμπή