In Section 5.17 in the EAP 7.2 Migration Guide, the compatibility issue with JSF 2.1 and JSF 2.3 can be removed. That was something that was added a while back for JSF 2.2 compatibility with JSF 2.1, it looks like it was updated by mistake when updating other JSF 2.2 references to JSF 2.3. JSF 2.3 is meant to be backwards compatible with previous releases of JSF. More details on this can be found here.