The concept of profiles that was used in previous versions of JBoss EAP is no longer used. JBoss EAP 6 now uses a small number of configuration files to hold all information about its configuration.
Modules and drivers are now loaded on an as-needed basis. Consequently the concept of a default profile - used in previous versions of JBoss EAP 6 to make the server start more efficiently - does not apply.
At deployment time, module dependencies are determined, ordered, resolved by the server or domain controller, and loaded in the correct order. Modules are unloaded when no deployment needs them any longer.
It is possible to disable modules or unload drivers and other services manually by removing the subsystems from the configuration. However, for most cases this is unnecessary. If none of your applications use a module, it will not be loaded.