use P2P auth for git-remote-tor-annex

This changes the environment variable name to the more generic
GIT_ANNEX_P2P_AUTHTOKEN.

This commit was sponsored by andrea rota.

Remote/Helper/Tor.hs

@@ -8,26 +8,8 @@
 module Remote.Helper.Tor where
 
 import Annex.Common
-import Utility.AuthToken
-import Creds
-import Utility.Tor
-import Utility.Env
 
 import Network.Socket
-import qualified Data.Text as T
-
--- Read the first line of the creds file. Environment variable overrides.
-getTorAuthTokenFor :: OnionAddress -> Annex (Maybe AuthToken)
-getTorAuthTokenFor (OnionAddress onionaddress) =
-	maybe Nothing mk <$> getM id 
-		[ liftIO $ getEnv torAuthTokenEnv
-		, readCacheCreds onionaddress
-		]
-  where
-	mk = toAuthToken . T.pack . takeWhile (/= '\n')
-
-torAuthTokenEnv :: String
-torAuthTokenEnv = "GIT_ANNEX_TOR_AUTHTOKEN"
 
 torHandle :: Socket -> IO Handle
 torHandle s = do