[GOT-1] Remove GRANT / REVOKE logic

[sanderpick]

_{From SyncLinear.com | GOT-1}

[brunocalza]

@sanderpick is this one to be done together with the new ACL? or I can simple remove the feature? I was kind of waiting the new acl work, but if the answer is simple remove I can work on it asap.

I was checking, and it looks like no one used the feature on mainnet. Maybe I can add a feature flag simply to not break the testnetapps ?

[sanderpick]

I think we may as well hold off on this until we have an idea about how access control will work in a cosmos / IPC type setup.

I've been thinking that if we can do custom validation during a transaction, we may as well leverage SQL access control / permissioning. Will share some ideas this week.