I don't see a meaningful application of a snubber in a standard boost converter circuit. Also no spike voltage should exist here, because it's directly cut by the output diode. Today's MOSFET have built-in zener protection and can handle voltage spikes without additional circuits.
Yes, in a standard boost converter circuit, a snubber will have no meaningful application/role. Snubber/Transient Suppressors play vital role in some other Topologies in S.M.P.S.