remove WITHOUT OIDS syntax for v19

[Junwang Zhao]

Hi hackers,

WITH OIDS was removed in v12, I'm wondering if we could remove the
WITHOUT OIDS support for v19.

attach is the trivial patch for $subject.

-- 
Regards
Junwang Zhao

v1-0001-chore-remove-WITHOUT-OIDS-syntax.patch
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