MAINTAINERS: Remove myself as libutvideo maintainer

I don't want to touch it, ever again.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

MAINTAINERS

@@ -210,7 +210,6 @@ Codecs:
   libschroedinger*                      David Conrad
   libspeexdec.c                         Justin Ruggles
   libtheoraenc.c                        David Conrad
-  libutvideo*                           Derek Buitenhuis
   libvorbis.c                           David Conrad
   libvpx*                               James Zern
   libx264.c                             Mans Rullgard, Jason Garrett-Glaser