FCREPO-1128: Prune libraries from 3.6
FCREPO-1128: Prune libraries from 3.6

Removes (unused, so far as I'm aware) rome dependency

https://jira.duraspace.org/browse/FCREPO-1128

andreasnef/fcrepo,andreasnef/fcrepo,fcrepo3/fcrepo,andreasnef/fcrepo,fcrepo3/fcrepo,fcrepo3/fcrepo,fcrepo3/fcrepo,andreasnef/fcrepo