lavf: remove disabled FF_API_LOOP_INPUT cruft

libavformat/avformat.h

@@ -897,13 +897,6 @@ typedef struct AVFormatContext {
 #define AVFMT_FLAG_CUSTOM_IO    0x0080 ///< The caller has supplied a custom AVIOContext, don't avio_close() it.
 #define AVFMT_FLAG_DISCARD_CORRUPT  0x0100 ///< Discard frames marked corrupted
 
-#if FF_API_LOOP_INPUT
-    /**
-     * @deprecated, use the 'loop' img2 demuxer private option.
-     */
-    attribute_deprecated int loop_input;
-#endif
-
     /**
      * decoding: size of data to probe; encoding: unused.
      */

libavformat/img2.c

@@ -228,11 +228,6 @@ static int read_header(AVFormatContext *s1)
         return ret;
     }
 
-#if FF_API_LOOP_INPUT
-    if (s1->loop_input)
-        s->loop = s1->loop_input;
-#endif
-
     av_strlcpy(s->path, s1->filename, sizeof(s->path));
     s->img_number = 0;
     s->img_count = 0;

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_LOOP_INPUT
-#define FF_API_LOOP_INPUT              (LIBAVFORMAT_VERSION_MAJOR < 54)
-#endif
 #ifndef FF_API_LOOP_OUTPUT
 #define FF_API_LOOP_OUTPUT             (LIBAVFORMAT_VERSION_MAJOR < 54)
 #endif