remove check hooks for GUCs that contribute to MaxBackends

When Who What
2024-07-05 19:48:56 Nathan Bossart (bossartn) Closed in commitfest 2024-07 with status: Committed
2024-07-03 16:52:12 Tom Lane (tgl) Added tgl as reviewer
2024-06-22 20:44:21 Nathan Bossart (bossartn) Added bossartn as committer
2024-06-22 20:44:20 Nathan Bossart (bossartn) New status: Ready for Committer
2024-06-19 19:11:37 Nathan Bossart (bossartn) Changed authors to Nathan Bossart (bossartn)
2024-06-19 19:11:37 Nathan Bossart (bossartn) Changed targetversion to 18
2024-06-19 19:11:31 Nathan Bossart (bossartn) Attached mail thread ZnMr2k-Nk5vj7T7H@nathan
2024-06-19 19:11:31 Nathan Bossart (bossartn) Created patch record