lavf: remove disabled FF_API_INTERLEAVE_PACKET cruft

libavformat/avformat.h

@@ -1449,16 +1449,6 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt);
  */
 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
 
-#if FF_API_INTERLEAVE_PACKET
-/**
- * @deprecated this function was never meant to be called by the user
- * programs.
- */
-attribute_deprecated
-int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
-                                 AVPacket *pkt, int flush);
-#endif
-
 /**
  * Write the stream trailer to an output media file and free the
  * file private data.

libavformat/mux.c

@@ -495,15 +495,6 @@ int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
     }
 }
 
-#if FF_API_INTERLEAVE_PACKET
-int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
-                                 AVPacket *pkt, int flush)
-{
-    return ff_interleave_packet_per_dts(s, out, pkt, flush);
-}
-
-#endif
-
 /**
  * Interleave an AVPacket correctly so it can be muxed.
  * @param out the interleaved packet will be output here

libavformat/version.h

@@ -49,9 +49,6 @@
  * the public API and may change, break or disappear at any time.
  */
 
-#ifndef FF_API_INTERLEAVE_PACKET
-#define FF_API_INTERLEAVE_PACKET       (LIBAVFORMAT_VERSION_MAJOR < 55)
-#endif
 #ifndef FF_API_AV_GETTIME
 #define FF_API_AV_GETTIME              (LIBAVFORMAT_VERSION_MAJOR < 55)
 #endif