How do you delete an entire playlist?
Bump. Would like to know that as well.
If you have MPaD/MPod installed on your idevice or a similar program on an Android device, you can do it by editing the playlist.
Like DrawsACircle said, mpad/mpod, or any other mpd client will be your best bet. I like Volumio’s web ui, but I use these clients far more for controlling the playback. ncmpcpp running off the rpi through shell is kind of cool too. Very geeky looking.