Remove mate-mplayer from [community] (FS#42248)

gnome-mplayer 1.0.9-2 adds caja extension, therefore this package is no 
longer needed. Users should use gnome-mplayer instead.


git-svn-id: file:///srv/repos/svn-community/svn@120990 9fca08f4-af9d-4005-b8df-a31f2cc04f65