If I remove a custom Log4J appender from my standalone.xml and restart JBoss, I can still see the POJO definition for the removed appender in my logging.properties file.

Reproduce:

1. Start JBoss in standalone mode
2. Log in to web console
3. Profile > core > logging > handlers > custom > add
4. name it whatever
5. class: {{org.apache.log4j.FileAppender}}
6. module: {{org.apache.log4j}}
7. Add a property: {{file -> /path/to/some/log4j.log}}
8. Add the appender to the root logger
9. Restart JBoss
10. Verify the log is populated and {{logging.properties}} has the appender
11. Stop JBoss
12. Edit {{standalone.xml}} and comment out the custom appender and the root logger reference
13. Start JBoss and stop it again after it completed startup
14. Uncomment the appender in {{standalone.xml}}
15. Start JBoss.
16. You should see an error about a duplicate entry in {{logging.properties}}