I get why you might want to leave, I really do. There's lots of perfectly good reasons, and more power to you if you feel one of the them is the right decision for you. But does that mean you have to remove every story you've ever written from every place it is posted before you go? I mean, sure, that's your prerogative as the writer, but there's one little downside you may have neglected to think about first.
I still want to READ them!