lavf: Drop deprecated bitexact functionality

Deprecated in 05/2014.

libavformat/mux.c

@@ -99,13 +99,6 @@ static int init_muxer(AVFormatContext *s, AVDictionary **options)
     if ((ret = av_opt_set_dict(s, &tmp)) < 0)
         goto fail;
 
-#if FF_API_LAVF_BITEXACT && FF_API_LAVF_AVCTX
-FF_DISABLE_DEPRECATION_WARNINGS
-    if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT)
-        s->flags |= AVFMT_FLAG_BITEXACT;
-FF_ENABLE_DEPRECATION_WARNINGS
-#endif
-
     // some sanity checks
     if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
         av_log(s, AV_LOG_ERROR, "no streams\n");

libavformat/version.h

@@ -48,9 +48,6 @@
  * dropped at a future version bump. The defines themselves are not part of
  * the public API and may change, break or disappear at any time.
  */
-#ifndef FF_API_LAVF_BITEXACT
-#define FF_API_LAVF_BITEXACT            (LIBAVFORMAT_VERSION_MAJOR < 58)
-#endif
 #ifndef FF_API_LAVF_FRAC
 #define FF_API_LAVF_FRAC                (LIBAVFORMAT_VERSION_MAJOR < 58)
 #endif