avformat: do not require frame_size in avformat_find_stream_info() for AAC

We already will get the needed info because of CODEC_CAP_CHANNEL_CONF

libavformat/utils.c

@@ -2019,7 +2019,6 @@ static int has_codec_parameters(AVCodecContext *avctx)
     case AVMEDIA_TYPE_AUDIO:
         val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
         if (!avctx->frame_size &&
-            (avctx->codec_id == CODEC_ID_AAC ||
              avctx->codec_id == CODEC_ID_MP1 ||
              avctx->codec_id == CODEC_ID_MP2 ||
              avctx->codec_id == CODEC_ID_MP3 ||