[bilibili] Fix bug in efc947fb3e

Authored by: u-spec-png

yt_dlp/extractor/bilibili.py

@@ -800,7 +800,6 @@ class BiliIntlBaseIE(InfoExtractor):
             sub_data = self._download_json(sub_url, ep_id, fatal=False)
             if not sub_data:
                 continue
-            sub_data = self._parse_json(sub_data)
             subtitles.setdefault(sub.get('key', 'en'), []).append({
                 'ext': 'srt',
                 'data': self.json2srt(sub_data)