Selling the shares, page-11

delisted is 100% legit and the ATO doesn’t have an issue with you realising a capital loss using their service.

another option would be to transfer the shares to say your spouse (if you have one) and that will realise the capital loss and in practical terms you will retain the shares (assuming that is of any interest to you). For this to be legitimate you would need to contact the registry and prepare and lodge a transfer form.