Server: Simplify PG12/Postgis 3 interaction

server/extension/sql/05_postgis3_adapter.sql

@@ -1,11 +0,0 @@
--- PG12_DEPRECATED
--- Create geomval if it doesn't exist (in postgis 3+ it only exists in postgis_raster)
-DO $$
-BEGIN
-    IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'geomval') THEN
-        CREATE TYPE cdb_dataservices_server.geomval AS (
-            geom geometry,
-            val double precision
-        );
-    END IF;
-END$$;