As a data company, deleting data has never been part of of DNA, but we made sure to give the features needed to better organize your vehicles.
The best options to "delete" a vehicle, is to simply use the owner property.
By setting the vehicle owner to FLEET, you can identify the vehicle you are managing as a fleet manager. When you want to remove the vehicle from your fleet, simply set the owner to inventory.
To make the most use of this property, have a look at this article on own to create a MY FLEET view.