An EOSIO smart contract for deleting created tokens and their account balances.
If you've created a token using the standard eosio.token or a compatible version of it,
you can deploy this contract to the account in order to delete the token from the stat
table and the account balances of the token from the accounts table using the destroytoken
and destroyacc actions respectively. This way you can reclaim your RAM to use it on other things.
More info here: https://eosio.stackexchange.com/a/1535/1834