Unused audio assets: how can I keep files and folders clean?

I have imported many sounds into a project. Some, I later deleted (deleted the sound layer).
I noticed that Animate didn’t purge them from the Audio folder in the Project Folder. They are all there.

I thus have many Mbs of useless clutter.

I can manually remove the files from the folder, but there must be a more efficient way of doing this.

Is there a way to purge the film (and the original folder, of course) of unused files?

Thank you,

Hmm this is one that I haven’t been asked before. I’ve submitted it as a feature request.