If a database is obsolete or you no longer want to restrict access to the database, you can remove the database from its assigned security role.
In the Alchemy Server console tree, expand Alchemy Server | <the node for your server’s name> | Security | Roles | <the target security role node>.
Expand the Authorized Databases node.
Right-click the database that you want to remove from the security role.
Click Delete ACL on the shortcut menu.
When prompted, click Yes to confirm your action.