[PostGIS] #5611: Remove the workaround for pgaudit being too verbose.

[PostGIS]

#5611: Remove the workaround for pgaudit being too verbose.
-------------------------+---------------------------
 Reporter:  mnencia      |      Owner:  pramsey
     Type:  enhancement  |     Status:  new
 Priority:  medium       |  Milestone:  PostGIS 3.4.1
Component:  postgis      |    Version:  3.4.x
 Keywords:               |
-------------------------+---------------------------
 In 1a90fe80 as a fix for #5076 you added a check to stop the installation
 of postgis extension if pgaudit is installed and logging.

 However, pgaudit fixed the issue in the Feb 25, 2022 release. Current
 versions of pgaudit don't log any statement issued during the create
 extension execution. (See
 https://github.com/pgaudit/pgaudit/commit/6460d9fec78c344245c70309551bb314415268a8)

 We should remove the pgaudit check or limit it to too old versions.
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5611>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.