[PostGIS] #6079: Remove support for GEOS < 3.10

[PostGIS]

#6079: Remove support for GEOS < 3.10
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 Reporter:  robe     |      Owner:  strk
     Type:  defect   |     Status:  assigned
 Priority:  medium   |  Milestone:  PostGIS 3.7.0
Component:  postgis  |    Version:  3.6.x
 Keywords:           |
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 I couldn't find a ticket for this so creating it

 https://gitea.osgeo.org/postgis/postgis/commit/8d6df5b8ef368723a125c62494a31b820b2454

 I also think this may need more work. As it looks like we just prevent
 building against but haven't removed the ifdefs we had to guard against <
 3.9.

 https://lists.osgeo.org/pipermail/postgis-devel/2026-January/030713.html
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6079>
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