[pinterest] do not force 'm3u8_native' for video downloads (#2436)

gallery_dl/extractor/pinterest.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2016-2021 Mike Fährmann
+# Copyright 2016-2022 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
@@ -54,7 +54,6 @@ class PinterestExtractor(Extractor):
             if pin["extension"] == "m3u8":
                 url = "ytdl:" + url
                 pin["extension"] = "mp4"
-                pin["_ytdl_extra"] = {"protocol": "m3u8_native"}
 
             yield Message.Url, url, pin