diff --git a/libavformat/avformat.c b/libavformat/avformat.c
index 7e747c43d5..882927f7b1 100644
--- a/libavformat/avformat.c
+++ b/libavformat/avformat.c
@@ -115,14 +115,6 @@ void ff_remove_stream(AVFormatContext *s, AVStream *st)
     ff_free_stream(&s->streams[ --s->nb_streams ]);
 }
 
-void ff_remove_stream_group(AVFormatContext *s, AVStreamGroup *stg)
-{
-    av_assert0(s->nb_stream_groups > 0);
-    av_assert0(s->stream_groups[ s->nb_stream_groups - 1 ] == stg);
-
-    ff_free_stream_group(&s->stream_groups[ --s->nb_stream_groups ]);
-}
-
 /* XXX: suppress the packet queue */
 void ff_flush_packet_queue(AVFormatContext *s)
 {
diff --git a/libavformat/internal.h b/libavformat/internal.h
index c6181683ef..f93832b3c4 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -635,11 +635,6 @@ void ff_remove_stream(AVFormatContext *s, AVStream *st);
  * is not yet attached to an AVFormatContext.
  */
 void ff_free_stream_group(AVStreamGroup **pstg);
-/**
- * Remove a stream group from its AVFormatContext and free it.
- * The group must be the last stream of the AVFormatContext.
- */
-void ff_remove_stream_group(AVFormatContext *s, AVStreamGroup *stg);
 
 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);