Merge branch 'ash2k/remove-old-doc' into 'master'

Remove outdated documentation as the issue has been addressed

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/101472



Merged-by: Suzanne Selhorn <sselhorn@gitlab.com>
Co-authored-by: Mikhail Mazurskiy <mmazurskiy@gitlab.com>