d9cacca2d1
This removes the last of the temporary debugging queries added to the regression tests by commit f03a9ca43. We've pretty much convinced ourselves that the plan instability we were seeing is due to VACUUM sometimes failing to update relpages/reltuples for a single-page table, due to bgwriter or checkpointer holding a pin on that page at just the wrong time. I'll push a workaround for that separately. Discussion: https://postgr.es/m/CA+hUKG+0CxrKRWRMf5ymN3gm+BECHna2B-q1w8onKBep4HasUw@mail.gmail.com
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