Remove “PRIV” ID3 tag from Google Play Music MP3s

I bought an album on Google Play Music today. Upon inspecting the ID3 tags I noticed a few ugly PRIV tags, but I couldn’t figure out how to get rid of them; none of the ID3 tag editors (puddletag, eyeD3, easytag, etc) or MP3 players (Quod Libet, Ex Falso, Rhythmbox, etc) would even display them. […]