fftools/ffmpeg: stop calling exit_program()

Remove exit_program() and register_exit(), as they are no longer used.

fftools/cmdutils.c

@@ -83,21 +83,6 @@ void init_dynload(void)
 #endif
 }
 
-static void (*program_exit)(int ret);
-
-void register_exit(void (*cb)(int ret))
-{
-    program_exit = cb;
-}
-
-void exit_program(int ret)
-{
-    if (program_exit)
-        program_exit(ret);
-
-    exit(ret);
-}
-
 int parse_number(const char *context, const char *numstr, int type,
                  double min, double max, double *dst)
 {

fftools/cmdutils.h

@@ -49,16 +49,6 @@ extern AVDictionary *swr_opts;
 extern AVDictionary *format_opts, *codec_opts;
 extern int hide_banner;
 
-/**
- * Register a program-specific cleanup routine.
- */
-void register_exit(void (*cb)(int ret));
-
-/**
- * Wraps exit with a program-specific cleanup routine.
- */
-void exit_program(int ret) av_noreturn;
-
 /**
  * Initialize dynamic library loading
  */

fftools/ffmpeg.c

@@ -1324,8 +1324,6 @@ int main(int argc, char **argv)
 
     init_dynload();
 
-    register_exit(ffmpeg_cleanup);
-
     setvbuf(stderr,NULL,_IONBF,0); /* win32 runtime needs this */
 
     av_log_set_flags(AV_LOG_SKIP_REPEATED);
@@ -1376,6 +1374,6 @@ finish:
     if (ret == AVERROR_EXIT)
         ret = 0;
 
-    exit_program(ret);
+    ffmpeg_cleanup(ret);
     return ret;
 }