remove default untrusted hack for bittorrent

This is better handled by checkPresent always failing.

Remote/BitTorrent.hs

@@ -72,8 +72,7 @@ gen r _ c gc =
 		}
 
 downloadKey :: Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex Bool
-downloadKey key _file dest p = do
+downloadKey key _file dest p = 
-	defaultUnTrusted
 	get . map (torrentUrlNum . fst . getDownloader) =<< getBitTorrentUrls key
   where
 	get [] = do
@@ -109,11 +108,6 @@ dropKey k = do
 checkKey :: Key -> Annex Bool
 checkKey key = error "cannot reliably check torrent status"
 
--- Makes this remote UnTrusted, unless it already has a trust set.
-defaultUnTrusted :: Annex ()
-defaultUnTrusted = whenM (isNothing . M.lookup bitTorrentUUID <$> trustMapRaw) $
-	trustSet bitTorrentUUID UnTrusted
-
 getBitTorrentUrls :: Key -> Annex [URLString]
 getBitTorrentUrls key = filter supported <$> getUrls key
   where

doc/special_remotes/bittorrent.mdwn

@@ -16,8 +16,5 @@ bittornado or the original BitTorrent client.
 Currently git-annex only supports downloading content from a torrent; 
 it cannot upload or remove content.
 
-Torrent swarms tend to come and go, so git-annex defaults to *not*
-trusting the bittorrent special remote.
-
 Multi-file torrents are supported; to handle them, `git annex addurl`
 will add a directory containing all the files from the torrent.