The following code points are long term unused (due to git). Maybe time to clean up. I don't provide a PR here, because I don't know what else has to be removed if at all. kkhan1@redhat.com maybe you can help.

• https://github.com/wildfly/wildfly-core/blob/16.0.0.Beta5/controller/src/main/java/org/jboss/as/controller/remote/OperationMessageHandlerProxy.java#L54

• https://github.com/wildfly/wildfly-core/blob/16.0.0.Beta5/jmx/src/main/java/org/jboss/as/jmx/model/MutabilityChecker.java#L71