libhb: remove mcdeint deinterlacer

It's slow and it's quality isn't perticularly impressive... and it relies
on the snow encoder which no longer exists in libav.


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5766 b64f7644-9d1e-0410-96f1-a4d463321fa5
libhb: svn rm mcdeint.*


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5767 b64f7644-9d1e-0410-96f1-a4d463321fa5