Remove zips

[jono-poltrack]

The Roses courses are maintained in the SCORM to TLA Roadmap repo - https://github.com/adlnet/SCORM-to-TLA-Roadmap/tree/master/examples/RosesCourseConversion

These are snapshots and will create version control nightmares (i had one last night).

Remove these and put in links to the ones in the roadmap repo