ffmpeg: drop undocumented -d option

Option was added in commit 39aafa5ee9 but was never documented.

Also does not seem there are current use cases for it,
tests for which it was introduced are still working therefore we drop
it altogether.

Indirectly fix trac issue: http://trac.ffmpeg.org/ticket/1698

Signed-off-by: Marton Balint <cus@passwd.hu>

fftools/ffmpeg.c

@@ -131,7 +131,6 @@ static BenchmarkTimeStamps get_benchmark_time_stamps(void);
 static int64_t getmaxrss(void);
 static int ifilter_has_all_input_formats(FilterGraph *fg);
 
-static int run_as_daemon  = 0;
 static int nb_frames_dup = 0;
 static unsigned dup_warning = 1000;
 static int nb_frames_drop = 0;
@@ -419,7 +418,7 @@ void term_init(void)
 #endif
 
 #if HAVE_TERMIOS_H
-    if (!run_as_daemon && stdin_interaction) {
+    if (stdin_interaction) {
         struct termios tty;
         if (tcgetattr (0, &tty) == 0) {
             oldtty = tty;
@@ -3531,7 +3530,7 @@ static int check_keyboard_interaction(int64_t cur_time)
     if (received_nb_signals)
         return AVERROR_EXIT;
     /* read_key() returns 0 on EOF */
-    if(cur_time - last_time >= 100000 && !run_as_daemon){
+    if (cur_time - last_time >= 100000) {
         key =  read_key();
         last_time = cur_time;
     }else
@@ -4513,10 +4512,6 @@ static int64_t getmaxrss(void)
 #endif
 }
 
-static void log_callback_null(void *ptr, int level, const char *fmt, va_list vl)
-{
-}
-
 int main(int argc, char **argv)
 {
     int i, ret;
@@ -4531,13 +4526,6 @@ int main(int argc, char **argv)
     av_log_set_flags(AV_LOG_SKIP_REPEATED);
     parse_loglevel(argc, argv, options);
 
-    if(argc>1 && !strcmp(argv[1], "-d")){
-        run_as_daemon=1;
-        av_log_set_callback(log_callback_null);
-        argc--;
-        argv++;
-    }
-
 #if CONFIG_AVDEVICE
     avdevice_register_all();
 #endif