The resource loader module ext.centralNotice.freegeoipLookup provided developers and 3rd party users a way to get geolocation for wikis not on the WMF cluster. However, the service it used is no longer available:
We should either update the module to use another free endpoint, or remove it.
Also, the large number RL of modules that CentralNotice registers is itself a performance draw. If we wish to no longer provide this facility for geolocation for 3rd party users, we could integrate this module into CN admin UI modules or elsewhere. However, geolocation itself should really not be part of CentralNotice. (See T102848.) So, changes here should also take that into account.