Hitler stops at Danzig, i.e. no Polish invasion, standing down to consolidate his gains in Austria and Czechoslovakia.
Does a German-only Holocaust still happen some years later?
I would think maybe, since no other nation would take on a mass influx of German Jews in a 100% deportation scenario.
Then again, no WWII most likely means no Wansee-esqe Conference emerging, which can potentially butterfly the entire idea of a "Final Solution".