Comment out Nominatim code as it was far exceeding rate limits

[sean-dunwoody]

The site was far exceeding the Nominatim usage policy, so these requests were being denied. We've disabled this functionality for now as, as far as we can tell, it doesn't seem to be being used anywhere important (and in any case it's not working at present).

See:

https://operations.osmfoundation.org/policies/nominatim/

[portableant]

Background info: This should be cached as a lookup, like in the API:

fitz-collection-online/app/Http/Controllers/Api/ApiController.php

Line 1260 in 8d5aaba

$gd = $geo->lookup();

The geo lookup was in place to enable linked art data exchange, coordinates in the API and coordinates for maps on the front end of the collection as the axiell system doesn't have them. Geocoding and storing the coords was on the collections roadmap in 2021/2022.