ffmpeg: remove unsed variable nopts

ffmpeg.c

@@ -695,7 +695,6 @@ static int read_avserver_streams(AVFormatContext *s, const char *filename)
 {
     int i, err;
     AVFormatContext *ic = NULL;
-    int nopts = 0;
 
     err = avformat_open_input(&ic, filename, NULL, NULL);
     if (err < 0)
@@ -726,9 +725,6 @@ static int read_avserver_streams(AVFormatContext *s, const char *filename)
             } else
                 choose_pixel_fmt(st, codec);
         }
-
-        if(st->codec->flags & CODEC_FLAG_BITEXACT)
-            nopts = 1;
     }
 
     av_close_input_file(ic);