lavf: remove disabled FF_API_FILESIZE cruft

libavformat/avformat.h

@@ -835,13 +835,6 @@ typedef struct AVFormatContext {
      */
     int64_t duration;
 
-#if FF_API_FILESIZE
-    /**
-     * decoding: total file size, 0 if unknown
-     */
-    attribute_deprecated int64_t file_size;
-#endif
-
     /**
      * Decoding: total stream bitrate in bit/s, 0 if not
      * available. Never set it directly if the file_size and the

libavformat/version.h

@@ -47,9 +47,6 @@
  * Those FF_API_* defines are not part of public API.
  * They may change, break or disappear at any time.
  */
-#ifndef FF_API_FILESIZE
-#define FF_API_FILESIZE                (LIBAVFORMAT_VERSION_MAJOR < 54)
-#endif
 #ifndef FF_API_MUXRATE
 #define FF_API_MUXRATE                 (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif