mpv/sponsorblock: Disable local database

It has been broken for a long time and is not likely to work again
soon[1].

[1]: https://github.com/po5/mpv_sponsorblock/issues/31

users/simon/modules/mpv/default.nix

@@ -243,6 +243,9 @@ in
     "mpv/script-opts/playlist_view.conf".text = ''
       thumbs_dir=${config.xdg.cacheHome}/thumbnails/mpv
     '';
+    "mpv/script-opts/sponsorblock.conf".text = ''
+      local_database=no
+    '';
 
     # make ytdl-hook use yt-dlp
     "mpv/script-opts/ytdl_hook.conf".text = ''