add and remove operation of jaxrs subsystem under deployment are useles and should not be available

Description of problem:
"add" and "remove" operation of jaxrs subsystem under deployment are useles and should not be available.

This operations were added by WFLY-3045.

How reproducible:
Always

Steps to Reproduce (remove):

1. ./standalone.sh
2. deploy /home/mkopecky/playground/resteasy/single-application/target/jaxrs-eap.war
3. /deployment=jaxrs-eap.war/subsystem=jaxrs:remove
4. :reload
5. # jaxrs subsystem is not removed

Steps to Reproduce (add):

1. deploy /home/mkopecky/playground/resteasy/empty-deployment/target/empty-eap.war
2. /deployment=empty-eap.war/subsystem=jaxrs:add()
3. :reload
4. # jaxrs subsystem is not added