It could mean nothing, but it could mean everything. As of this morning, Bob Mansfield was still a senior vice president at one of the world's most iconic technology firms. As of now, his leadership bio is nowhere to be found on Apple's official web presence. If you'll recall, Mansfield has had an interesting couple of years at Apple. In June of 2012, he abruptly announced that he was retiring. A couple of weeks later, he publicly addressed mounting criticism regarding Apple's computers and their relationship with EPEAT, seemingly putting the kibosh on said retirement. A few weeks following that, Mansfield actually got a promotion, with his responsibilities growing once again during the executive shakeup of October 2012. It's unclear if someone accidentally deleted the profile of one of Apple's most important figureheads (read: unlikely), or if Mr. Mansfield truly has stepped aside, but we'll be reaching out to Apple in hopes of clarifying things.
Update: Reuters' Poornima Gupta is reporting that Mansfield is "no longer with Apple's executive team, but will remain at Apple working on special projects reporting to Tim Cook."