Remove completely unsed structure fields mc_type and chroma_format.

Their only user, MPlayer, has already been updated not to use them anymore.

Originally committed as revision 17300 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/xvmc.h

@@ -40,13 +40,7 @@ struct xvmc_render_state {
     XvMCMacroBlock* mv_blocks;
     int             total_number_of_mv_blocks;
     int             total_number_of_data_blocks;
-#if LIBAVCODEC_VERSION_MAJOR < 53
-    int             mc_type;                      ///< XVMC_MPEG1/2/4,XVMC_H263 without XVMC_IDCT
-#endif
     int             idct;                         ///< indicate that IDCT acceleration level is used
-#if LIBAVCODEC_VERSION_MAJOR < 53
-    int             chroma_format;                ///< XVMC_CHROMA_FORMAT_420/422/444
-#endif
     int             unsigned_intra;               ///< +-128 for intra pictures after clipping
     XvMCSurface*    p_surface;                    ///< pointer to rendered surface, never changed
 //}@