[aur-general] Drop mplayer2 from [community]

Mplayer2 was very promising last year when they forked from the original mplayer project. One of the main goal of this project was to provide more frequent release and updates. Unfortunatly, they failled to provide something else after the initial release. This initial release no longer build with current tools/libs and contain several major bugs. A workaround was to update our pkg to a recent git snapshot. Since then, I do not see any reason to continue to update this package which is currently broken. If there is no objection, I will drop the package from [community]. Users should consider to follow mplayer2-git from AUR or the original mplayer from [extra]. Cheers, Stéphane