Remove repeated PQfnumber() in pg_dump

When Who What
2021-08-27 14:27:26 Daniel Gustafsson (d_gustafsson) Closed in commitfest 2021-09 with status: Committed
2021-08-26 13:42:55 Daniel Gustafsson (d_gustafsson) Added d_gustafsson as committer
2021-08-26 13:42:52 Daniel Gustafsson (d_gustafsson) Added d_gustafsson as reviewer
2021-07-22 23:39:38 Nathan Bossart (bossartn) New status: Ready for Committer
2021-07-22 23:39:35 Nathan Bossart (bossartn) Added bossartn as reviewer
2021-07-15 01:12:10 Zhijie Hou (houzj) Changed authors to hou zhijie (houzj)
2021-07-15 01:11:48 Zhijie Hou (houzj) Attached mail thread OS0PR01MB57164C392783F29F6D0ECA0B94139@OS0PR01MB5716.jpnprd01.prod.outlook.com
2021-07-15 01:11:48 Zhijie Hou (houzj) Created patch record