Delete's a role from the instance.
{"msg":"RoleManager","instance_guid":"my_session_id_here","cmd":"DeleteRole","role_name":"good bean","role_id":"superadmin"}

The server will delete the role from the instance and respond with:
{"MSG":"RoleDeleted","RoleName":"good bean"}

If the role is locked:
{"MSG":"LockedRole"}

If you do not have permissions to edit the role or is not the host:
{"MSG":"DenyRoleAccess"}