matroskaenc: Don't write track timecode scale

It's not required for mkv and unsupported in webm

Originally committed as revision 23247 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/matroskaenc.c

@@ -544,7 +544,6 @@ static int mkv_write_tracks(AVFormatContext *s)
         put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER     , i + 1);
         put_ebml_uint (pb, MATROSKA_ID_TRACKUID        , i + 1);
         put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0);    // no lacing (yet)
-        put_ebml_float(pb, MATROSKA_ID_TRACKTIMECODESCALE, 1.0);
 
         if ((tag = av_metadata_get(st->metadata, "title", NULL, 0)))
             put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);