Honda Civic head resurfacing. Valves are too high?

Question, i took the head off my 2002 civic lx and i was checking it with a straight edge. When i pass it over the mating surface, it hits the open valves. Is removing the valves a must when milling it? Ive seen other heads with the valves completely closed when being milled.

Motor is a d17a1 btw.

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