Late last year, we heard that Apple was working on a version of the iPod shuffle with the headphone port that was added to 2008 iPods—you know, the one with remote control and microphone support. Why would the shuffle need a microphone, we wondered, given that it had no way to record anything? The signs pointed to either an imminent complete redesign or something else. Today, we got our answer: the iPod shuffle lost its buttons. Now, you control…