The backend was kept only for Mac OS X 10.6 support. AVFoundation is used in 10.7 and later. Following the 10.6 deprecation plan, the code is now being removed for Qt 5.4. Change-Id: I513d00adda35f6012dda548b8d824d158efffb16 Reviewed-by: Andy Nichols <andy.nichols@digia.com> Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>