Revert "fix: geojson invalid query on unavailable PostGIS"

This reverts commit 0f1ca8faac.

Reverting for now as it adds one more query to the schema cache and
there's no clear way forward on how to integrate the fix with the
current schema cache queries.

See discussion on
https://github.com/PostgREST/postgrest/pull/4246#pullrequestreview-3093174224.

test/io/__snapshots__/test_cli/test_schema_cache_snapshot[dbMediaHandlers].yaml

@@ -3,6 +3,11 @@
   - - tag: BuiltinOvAggCsv
     - tag: MTTextCSV
 
+- - - tag: RelAnyElement
+    - tag: MTGeoJSON
+  - - tag: BuiltinOvAggGeoJson
+    - tag: MTGeoJSON
+
 - - - tag: RelAnyElement
     - tag: MTApplicationJSON
   - - tag: BuiltinOvAggJson

test/io/test_io.py

@@ -1137,18 +1137,6 @@ def test_no_pool_connection_required_on_bad_embedding(defaultenv):
         assert response.status_code == 400
 
 
-def test_no_pool_connection_required_on_unavailable_postgis(defaultenv):
-    "no pool connection should be consumed when PostGIS is not available, the request should be quickly rejected at the plan level"
-
-    headers = {
-        "Accept": "application/geo+json",
-    }
-
-    with run(env=defaultenv, no_pool_connection_available=True) as postgrest:
-        response = postgrest.session.get("/projects", headers=headers)
-        assert response.status_code == 406
-
-
 # https://github.com/PostgREST/postgrest/issues/2620
 def test_notify_reloading_catalog_cache(defaultenv):
     "notify should reload the connection catalog cache"