To Delete or Archive a RAR Series, you will need to click on the Three dots then navigate to the RAR Series configuration by clicking on Configure RAR Series highlighted below:

Click on the Trash icon to delete the series alternatively specify an End Date then click on Archive should you want the series to be removed from your list of Reviewers but the RARs should still be recorded on the RAR compliance report.

Should the need to Unarchive a RAR series arise, kindly note you can do this by adding a RAR series with the same Reviewer linked to the Archived series and Click on Reactivate.