fftools/ffmpeg_dec: remove side data copy block

It's no longer needed now that lavc handles this.

Signed-off-by: James Almer <jamrial@gmail.com>

fftools/ffmpeg_dec.c

@@ -788,15 +788,6 @@ static int packet_decode(DecoderPriv *dp, AVPacket *pkt, AVFrame *frame)
 
         frame->time_base = dec->pkt_timebase;
 
-        for (int i = 0; i < dec->nb_decoded_side_data; i++) {
-            const AVFrameSideData *src = dec->decoded_side_data[i];
-            if (av_frame_side_data_get(frame->side_data, frame->nb_side_data, src->type))
-                continue;
-            ret = av_frame_side_data_clone(&frame->side_data, &frame->nb_side_data, src, 0);
-            if (ret < 0)
-                return ret;
-        }
-
         if (dec->codec_type == AVMEDIA_TYPE_AUDIO) {
             dp->dec.samples_decoded += frame->nb_samples;