Update documentation for finders

The non-English finders have been removed from Whitehall, so we can
update the documentation to reflect this.

docs/finders.md

@@ -9,16 +9,9 @@ finder-frontend and published from [search-api](https://github.com/alphagov/sear
 We redirect searches from the old finders to the new in order to maintain a
 reasonable experience for users.  Because we need to translate some of the
 query parameters, we do it in the controllers:
-- [announcements](https://github.com/alphagov/whitehall/blob/master/app/controllers/announcements_controller.rb)
-- [publications](https://github.com/alphagov/whitehall/blob/master/app/controllers/publications_controller.rb)
 - [statistics](https://github.com/alphagov/whitehall/blob/master/app/controllers/statistics_controller.rb)
 - [statistics announcements](https://github.com/alphagov/whitehall/blob/master/app/controllers/statistics_announcements_controller.rb)
 
-There are still some remaining finder-like-things for translated content
-([example of statistics in Welsh](https://www.gov.uk/government/statistics.cy)).
-These use the Whitehall database and not Elasticsearch so they're different from
-the things that we've retired.
-
 ## How to publish a finder in whitehall
 
 **Please consider publishing new finders from [search-api](https://github.com/alphagov/search-api/tree/master/config/finders). There are [schema tests for both finders and email signup pages](https://github.com/alphagov/search-api/tree/630a6947395d11267be3cc056c7370c65bb5723e/spec/unit/content_item_publisher) there.**