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you can delete that but you have to connect the 2 hoses so the coolant can run in your heater core, all it does it block coolant to the heater core when the heater is not being used. I had mine removed and my heater works fine.
You'll also need to get s couple of egr block off plates for your intake manifold, one for the bottom left of the # 6 runner like you see in the pic, and one for the top (idestroyed my mani don't have a pic of the top one)