Delete media when delete track?

Would it be good to display a popup when we delete a track : “Do you want to delete also the media ?”.
It can be good to delete the files to avoid having lots of unused media.

Not good for undo though?
We really rather leave it to the user to decide when and which media files should be deleted.

That’s why when the user click on minus button to delete the track, VST live would ask him if he wants to delete the media or keep it to the project folder.