Removing unused audio assets?

I have a Char Anim project with tons of voice-over audio files with many of the VO takes replaced with pick-ups... is there any way to determine which ones are not currently used anymore and can be safely deleted from the project similar to what you can do in Premiere/AfterEffects? I'd hate to mistakenly delete something that was still in use in a scene.

If such a feature doesn't exist, I humbly request it be added.