setup adminroles remove
setup adminroles list
setup adminroles role1 role2 ...
admins is a valid alternate name for this command.

The command remove will remove ALL admin roles that were specified.
The command list will show all the roles that are defined as admins for the bot.

You can add the roles one by one or all together, you can use the mention symbol (@) or just type the name to find them.
The roles specified will be added to the list. If you need to remove some, you have to remove all of them and the re-add the ones you want.