Find the Artist you want to remove on your Roster. Click on their name, then click on Artist Settings in the left side navigation bar.
You'll be taken to your general Artist Settings and see your artist name and timezone, along with a Delete Artist Button
3. By clicking on the Delete Artist Button, you'll be prompted to type out the Artist's name to confirm that you want to delete them.
4. Once you type out the Artist's name and click Delete, the Artist will no longer be on your Roster, and you will no longer have access to their data.
If you delete your artist, the corresponding data for that data is deleted. This is irreversible, so be certain that you will not need that data before deleting.