sync, assistant: Sync with remotes that have annex-ignore set

This is so git remotes on servers without git-annex installed can be used
to keep clients' git repos in sync.

This is a behavior change, but since annex-sync can be set to disable
syncing with a remote, I think it's acceptable.

Remote/List.hs

@@ -98,10 +98,6 @@ updateRemote remote = do
 			Remote.Git.configRead r
 		| otherwise = return r
 
-{- All remotes that are not ignored. -}
-enabledRemoteList :: Annex [Remote]
-enabledRemoteList = filter (not . remoteAnnexIgnore . gitconfig) <$> remoteList
-
 {- Checks if a remote is a special remote -}
 specialRemote :: Remote -> Bool
 specialRemote r = remotetype r /= Remote.Git.remote