[NEEDS INFO] Deleting Old Unused Maps

So, my map cache folder is getting quite large. I had a look in there and there are a lot of old maps in there, but many are still used to this day. I'd like to delete some. Is there a way to determine which maps/character/weapon/etc. packs haven't been used in years? All one can see in the folder is when the files were first downloaded, not when it was last accessed by Xonotic.

just empty it all if you want servers will just redownload it