## Summary
Relates to #162551
Links returning 404 on [Elasticsearch service
page](https://www.elastic.co/guide/en/kibana/current/elasticsearch-service.html)
in the Developer guide.
Replaced the link to the data plug in and one to the global search
plugin (though I'm not sure keeping the sentence and the link to the
global search plugin is useful - maybe we should just remove both
completely). Removed the link 'Elasticsearch service API docs'
altogether.
