Remove origin from default searches

[OtterleyW]

Remove origin from default-location-searches.js because it is not needed for Mapbox or Google Maps.

According to Google Maps documentation using origin parameter is optional unless you specify an origin_place_id in your URL and according to Mapbox documentation origin parameter is needed only when using the Directions API. Neither of these is used in FTW.

[Gnito]

Sorry, I forgot to mention that there is one use case where the origin is used:
if sortSearchByDistance is set to true in config.js, the origin should be sent to Flex API.

By default, this feature is turned off since it gives funny results on search page (map view) with pagination, page results are spread on a "results distance circle" per pagination page. However, it is useful if someone wants to give more impact to distance (and less to map view). I.e. creates a list view for search results like we have in Go.

So, I have one small request: add a comment to config.js next to sortSearchByDistance that default searches need origin if the flag is turned on. (The use case is so rare that this story of removing the origin from default searches makes sense - it serves much wider audience.)