Just remove the top bolt and cut the PHH in two and then wiggle the metal tube back and forth until the lower bracket breaks off. Takes about 5 minutes. Then it is easy to lift out. You can also just reuse the metal tube as it is easy to replace instead of using 3 feet of hose.
Would suggest running heater hose directly from PHH block nipple to the heater valve, saves two connections. If you do this make sure you get at a minimum Gates Green Stripe hose or silicone hose - it gets hot under there!