Remove eventsourcing library

While trying to introduce Instant instead of long for EventSourcing library, it is detected that org.apache.zest.library.eventsourcing.domain.source.helper.DomainEventTrackerConfiguration#lastOffset is used with both a event counting mechanism as well as the current millis timestamp. Whether or not that actually is a problem or not is unclear, but what is clear is that it is bad design and I can't figure out how to fix it.
I also doubt that anyone can make much use of it, since it is largely undocumented, yet a large package.