Cleanup satellites from settings and remove satellites directory

Cleanup in major release after !981 (merged)

mentioned in merge request !981 (merged)

Thanks for creating a tracking issue for this @dzaporozhets

Milestone changed to 8.1

mentioned in merge request !1137 (merged)

mentioned in issue #2247 (closed)

@dzaporozhets Since you can't lose any data by deleting satellites I think we should do this in 8.0 instead of 8.1.

From call: @jacobvosmaer asked to leave it till 8.1. Need to update blog post. cc @sytses

Thanks @dzaporozhets . My reasoning was that even though satellites can be recreated, it was very painful for us on gitlab.com last week, so I think we should be more cautious.

I've changed the blog post https://gitlab.com/gitlab-com/www-gitlab-com/commit/ad24c2dfa35be6b6551e2451fc75c4e72773d66a

This is done afaik.

Status changed to closed