avcodec/vorbis: remove avpriv vorbis parser cruft

It was replaced by a public API

libavcodec/vorbis_parser.c

@@ -296,27 +296,6 @@ AVVorbisParseContext *av_vorbis_parse_init(const uint8_t *extradata,
     return s;
 }
 
-#if LIBAVCODEC_VERSION_MAJOR < 57
-int avpriv_vorbis_parse_extradata(AVCodecContext *avctx, AVVorbisParseContext *s)
-{
-    return vorbis_parse_init(s, avctx->extradata, avctx->extradata_size);
-}
-void avpriv_vorbis_parse_reset(AVVorbisParseContext *s)
-{
-    av_vorbis_parse_reset(s);
-}
-int avpriv_vorbis_parse_frame(AVVorbisParseContext *s, const uint8_t *buf,
-                              int buf_size)
-{
-    return av_vorbis_parse_frame(s, buf, buf_size);
-}
-int avpriv_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf,
-                                    int buf_size, int *flags)
-{
-    return av_vorbis_parse_frame_flags(s, buf, buf_size, flags);
-}
-#endif
-
 #if CONFIG_VORBIS_PARSER
 
 typedef struct VorbisParseContext {

libavcodec/vorbis_parser_internal.h

@@ -43,44 +43,4 @@ struct AVVorbisParseContext {
     int prev_mask;              ///< bitmask used to get the previous mode flag in each packet
 };
 
-#if LIBAVCODEC_VERSION_MAJOR < 57
-/**
- * Initialize the Vorbis parser using headers in the extradata.
- *
- * @param avctx codec context
- * @param s     Vorbis parser context
- */
-int avpriv_vorbis_parse_extradata(AVCodecContext *avctx, AVVorbisParseContext *s);
-
-/**
- * Get the duration for a Vorbis packet.
- *
- * avpriv_vorbis_parse_extradata() must have been successfully called prior to
- * this in order for a correct duration to be returned. If @p flags is @c NULL,
- * special frames are considered invalid.
- *
- * @param s        Vorbis parser context
- * @param buf      buffer containing a Vorbis frame
- * @param buf_size size of the buffer
- * @param flags    flags for special frames
- */
-int avpriv_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf,
-                                    int buf_size, int *flags);
-
-/**
- * Get the duration for a Vorbis packet.
- *
- * avpriv_vorbis_parse_extradata() must have been successfully called prior to
- * this in order for a correct duration to be returned.
- *
- * @param s        Vorbis parser context
- * @param buf      buffer containing a Vorbis frame
- * @param buf_size size of the buffer
- */
-int avpriv_vorbis_parse_frame(AVVorbisParseContext *s, const uint8_t *buf,
-                              int buf_size);
-
-void avpriv_vorbis_parse_reset(AVVorbisParseContext *s);
-#endif
-
 #endif /* AVCODEC_VORBIS_PARSER_H */