There seems to be no way to create a DelegateToken that is not ERC721/ERC20/ERC1155, but due to the fact that DelegationType supports also ALL and CONTRACT:
And there are multiple ways to create DelegateToken (e.g. DelegateToken.create and CreateOfferer.transferFrom, but more contracts could be created in the future), it would be safer to revert the transaction on withdraw to avoid burning unsupported tokens:
https://github.com/code-423n4/2023-09-delegate/blob/main/src/DelegateToken.sol#L353-L386
