Merge commit 'ff853343'

* commit 'ff853343':
  mpegvideo: Drop unused MPEG_BUF_SIZE and CHROMA_444 defines

CHROMA_444 is not removed as we do support CHROMA_444 and use the
identifier
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mpegvideo.h

@@ -62,8 +62,6 @@ enum OutputFormat {
     FMT_MJPEG,
 };
 
-#define MPEG_BUF_SIZE (16 * 1024)
-
 #define QMAT_SHIFT_MMX 16
 #define QMAT_SHIFT 21