remove incorrect comment

resourcePrepare does not cause the resource to only be prepared once.

The http manager should be reused, which does avoid http connection
overhead, but not because of the use of resourcePrepare.

Remote/WebDAV.hs

@@ -120,8 +120,6 @@ webdavSetup _ mu mcreds c gc = do
 	c'' <- setRemoteCredPair encsetup c' gc (davCreds u) creds
 	return (c'', u)
 
--- Opens a http connection to the DAV server, which will be reused
--- each time the helper is called.
 prepareDAV :: Remote -> (Maybe DavHandle -> helper) -> Preparer helper
 prepareDAV = resourcePrepare . const . withDAVHandle