Remove unnecessary legacy HB_VCODEC define and minor cleanup.



git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5370 b64f7644-9d1e-0410-96f1-a4d463321fa5
Update outdated comment.



git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5371 b64f7644-9d1e-0410-96f1-a4d463321fa5