cache remote.log

Unlikely to speed up any of the existing uses much, but I want to use it
in a message that might be displayed many times.

Assistant/WebApp/Configurators/Delete.hs

@@ -59,7 +59,7 @@ getFinishDeleteRepositoryR uuid = deletionPage $ do
 
 	reponame <- liftAnnex $ Remote.prettyUUID uuid
 	{- If it's not listed in the remote log, it must be a git repo. -}
-	gitrepo <- liftAnnex $ M.notMember uuid <$> readRemoteLog
+	gitrepo <- liftAnnex $ M.notMember uuid <$> remoteConfigMap
 	$(widgetFile "configurators/delete/finished")	
 
 getDeleteCurrentRepositoryR :: Handler Html