1 files changed, 0 insertions, 48 deletions
diff --git a/yt_dlp/downloader/niconico.py b/yt_dlp/downloader/niconico.py
index 310144e7d..33cf15df8 100644
--- a/yt_dlp/downloader/niconico.py
+++ b/yt_dlp/downloader/niconico.py
@@ -2,60 +2,12 @@ import json
 import threading
 import time
 
-from . import get_suitable_downloader
 from .common import FileDownloader
 from .external import FFmpegFD
 from ..networking import Request
 from ..utils import DownloadError, str_or_none, try_get
 
 
-class NiconicoDmcFD(FileDownloader):
-    """ Downloading niconico douga from DMC with heartbeat """
-
-    def real_download(self, filename, info_dict):
-        from ..extractor.niconico import NiconicoIE
-
-        self.to_screen(f'[{self.FD_NAME}] Downloading from DMC')
-        ie = NiconicoIE(self.ydl)
-        info_dict, heartbeat_info_dict = ie._get_heartbeat_info(info_dict)
-
-        fd = get_suitable_downloader(info_dict, params=self.params)(self.ydl, self.params)
-
-        success = download_complete = False
-        timer = [None]
-        heartbeat_lock = threading.Lock()
-        heartbeat_url = heartbeat_info_dict['url']
-        heartbeat_data = heartbeat_info_dict['data'].encode()
-        heartbeat_interval = heartbeat_info_dict.get('interval', 30)
-
-        request = Request(heartbeat_url, heartbeat_data)
-
-        def heartbeat():
-            try:
-                self.ydl.urlopen(request).read()
-            except Exception:
-                self.to_screen(f'[{self.FD_NAME}] Heartbeat failed')
-
-            with heartbeat_lock:
-                if not download_complete:
-                    timer[0] = threading.Timer(heartbeat_interval, heartbeat)
-                    timer[0].start()
-
-        heartbeat_info_dict['ping']()
-        self.to_screen('[%s] Heartbeat with %d second interval ...' % (self.FD_NAME, heartbeat_interval))
-        try:
-            heartbeat()
-            if type(fd).__name__ == 'HlsFD':
-                info_dict.update(ie._extract_m3u8_formats(info_dict['url'], info_dict['id'])[0])
-            success = fd.real_download(filename, info_dict)
-        finally:
-            if heartbeat_lock:
-                with heartbeat_lock:
-                    timer[0].cancel()
-                    download_complete = True
-        return success
-
-
 class NiconicoLiveFD(FileDownloader):
     """ Downloads niconico live without being stopped """