Merge branch 'eread/remove-upgrade-information-for-unsupported-versions' into 'master'

Remove upgrade information for unsupported versions

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/128179



Merged-by: Kati Paizee <kpaizee@gitlab.com>
Approved-by: Kati Paizee <kpaizee@gitlab.com>
Co-authored-by: Evan Read <eread@gitlab.com>