How to delete a link

Permanent - there's no restore. Consider expiration first.

Open the link and delete it, or select it from your Links list and use bulk delete. Deleting removes the link, every short URL attached to it, and its click history.

This can't be undone - see What happens when I delete a link?. If you just want a link to stop working at a specific time (not right now), set an expiration date instead.