COMPARE_POINTER_FIELD been dead 13 years after living 2 weeks

I happened to notice that we have a macro COMPARE_POINTER_FIELD in
nodes/equalfuncs.c that Tom introduced in 2eafcf68d563d (25 Nov 2002)
and then removed its only callers a0bf885f9ea (12 Dec 2002).
Should we just remove it?

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Álvaro Herrera                          Developer, http://www.PostgreSQL.org/