Solaris 10 necessary file question

We removed the following default accounts in Solaris 10: lp, smmsp, www, uucp, nuccp, however the files owned by these accounts still exist. I would like to delete these files, but the administrator is not very familiar with Solaris and doesn't know if the O/S needs the associated files or not. Does anyone know if those files are still in use even though the file's owner accounts have been deleted?

Thank You in Advance,
Jeff