Cleanup torrent providers

couchpotato/core/providers/nzb/ftdworld/main.py

couchpotato/core/providers/nzb/newznab/main.py

couchpotato/core/providers/nzb/omgwtfnzbs/main.py

couchpotato/core/providers/torrent/base.py

couchpotato/core/providers/torrent/kickasstorrents/main.py

couchpotato/core/providers/torrent/passthepopcorn/main.py

couchpotato/core/providers/torrent/publichd/main.py

couchpotato/core/providers/torrent/sceneaccess/main.py

couchpotato/core/providers/torrent/scenehd/main.py

couchpotato/core/providers/torrent/thepiratebay/main.py

couchpotato/core/providers/torrent/torrentleech/main.py