Remove album art from MP3 files using the command line

I want to remove the album art that is embedded in a bunch of MP3s (thousands) and cannot find a command-line way to do this. I can add art via lame and I can add or remove pretty much any other tags with id3tag but I can’t find a way to do something like:

for file in **/*.mp3 do  $file; done

Anyone know what I might put in for ``?