remove non standard object type ids, if you find samples, report them

Originally committed as revision 11610 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/isom.c

@@ -49,12 +49,6 @@ const AVCodecTag ff_mp4_obj_type[] = {
     { CODEC_ID_VORBIS    , 221 },
     { CODEC_ID_PCM_S16LE , 224 },
     { CODEC_ID_QCELP     , 225 },
-    { CODEC_ID_AC3       , 226 },
-    { CODEC_ID_PCM_ALAW  , 227 },
-    { CODEC_ID_PCM_MULAW , 228 },
-    { CODEC_ID_PCM_S16BE , 230 },
-    { CODEC_ID_H263      , 242 },
-    { CODEC_ID_H261      , 243 },
     { 0, 0 },
 };