avformat/dashenc: Remove muxer overhead from Bandwidth field in DASH manifest

Fixes bug id #7386
Muxer overhead calculations was intented for HLS playlist as Apple's mediastreamvalidator tests were failing.
But applying the same fix for DASH manifest proved counterproductive, as Bandwidth can be used for segment name templates.

libavformat/dashenc.c

@@ -611,7 +611,7 @@ static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_ind
 
         if (os->bit_rate > 0)
             snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"",
-                     os->bit_rate + os->muxer_overhead);
+                     os->bit_rate);
 
         if (as->media_type == AVMEDIA_TYPE_VIDEO) {
             AVStream *st = s->streams[i];