[PostGIS] #6032: postgis_tiger_geocoder upgrade script for PostgreSQL < 16 not stripping extension placeholder

[PostGIS]

#6032: postgis_tiger_geocoder upgrade script for PostgreSQL < 16 not stripping
extension placeholder
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  Reporter:  robe            |      Owner:  robe
      Type:  defect          |     Status:  new
  Priority:  blocker         |  Milestone:  PostGIS 3.6.2
 Component:  tiger geocoder  |    Version:  3.5.x
Resolution:                  |   Keywords:
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Comment (by robe):

 Should note this doesn't impact CREATE EXTENSION just ALTER EXTENSION for
 PostgreSQL < 16
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6032#comment:2>
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