Commit d31bbfb659 lost some test coverage, because the situation
being tested, a concurrent DROP, cannot happen anymore. Put the test
coverage back with a bit of a trick, by deleting directly from the
catalog table.
Co-authored-by: Noah Misch <noah@leadboat.com>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Discussion: https://www.postgresql.org/message-id/flat/bf72b82c-124d-4efa-a484-bb928e9494e4@eisentraut.org