If you don’t have plans to keep a user’s data and you want to free up a user spot you can delete the user by going to Users
→ select user
→ delete user
. This will delete all their time entries, so if you still need their data, it would be best to archive the user
. Please remember that once deleted, the data can’t be recovered.
If you don’t want to activate or add another user, you should go and change the subscription as well, to reflect the change by clicking on your name (bottom left corner) → Subscription and billing → change subscription.