Removes a client from a specific role.
{"msg":"RoleManager","instance_guid":"my_session_id_here","cmd":"RemoveClientFromRole","role_name":"good bean","socketid":0,"role_id":"superadmin"}

The server will remove the client from the role and respond with:
{"MSG":"ClientRemovedFromRole","RoleName":"good bean","SocketID":0}

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

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