remove support for AUX housenumber tables

These tables have never been actively maintained and the code is
completely untested. With the upcomming changes, it is unlikely
that the code remains usable.

This removes the aux tables and all code that references them.

lib-sql/functions/address_lookup.sql

@@ -135,20 +135,6 @@ BEGIN
   END IF;
   {% endif %}
 
-  -- then additional data
-  {% if config.get_bool('USE_AUX_LOCATION_DATA') %}
-  IF place IS NULL THEN
-    SELECT parent_place_id as place_id, 'us' as country_code,
-           housenumber, postcode,
-           'place' as class, 'house' as type,
-           null as name, null as address,
-           centroid
-      INTO place
-      FROM location_property_aux
-      WHERE place_id = in_place_id;
-  END IF;
-  {% endif %}
-
   -- postcode table
   IF place IS NULL THEN
     SELECT parent_place_id as place_id, country_code,