Remove unused code and use ExpiringArchiveTestConfiguration instead of overriding getFilesArchiveFrequency.
Remove unused code and use ExpiringArchiveTestConfiguration instead of overriding getFilesArchiveFrequency.

CoreFiling/reviki,strr/reviki,CoreFiling/reviki,ashirley/reviki,ashirley/reviki,paulcadman/reviki,ashirley/reviki,strr/reviki,CoreFiling/reviki,paulcadman/reviki,strr/reviki,CoreFiling/reviki,strr/reviki,CoreFiling/reviki,paulcadman/reviki,ashirley/reviki,strr/reviki,paulcadman/reviki,ashirley/reviki