remove duplicate Vorbis comment tag handling

Originally committed as revision 10704 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/oggparsevorbis.c

@@ -102,10 +102,6 @@ vorbis_comment(AVFormatContext * as, uint8_t *buf, int size)
                 as->track = atoi(ct);
             else if (!strcmp(tt, "ALBUM"))
                 av_strlcpy(as->album, ct, sizeof(as->album));
-            else if (!strcmp(tt, "GENRE"))
-                av_strlcpy(as->genre, ct, sizeof(as->genre));
-            else if (!strcmp(tt, "DESCRIPTION"))
-                av_strlcpy(as->comment, ct, sizeof(as->comment));
         }
     }