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

In Ogg/CELT, frame_size is found in the same place as the sample_rate and
channels, so we do not need to force the frame_size to be parsed.

libavformat/utils.c

@@ -2018,9 +2018,6 @@ static int has_codec_parameters(AVCodecContext *avctx)
     switch (avctx->codec_type) {
     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_CELT))
-            return 0;
         break;
     case AVMEDIA_TYPE_VIDEO:
         val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;