Merge branch 'docs-conversion-gitlab-version-rem' into 'master'

Remove outdated GitLab version from Conversion doc

See merge request gitlab-org/gitlab!77409

doc/administration/instance_review.md

@@ -6,8 +6,6 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # Instance review **(FREE SELF)**
 
-> Introduced in GitLab 11.3.
-
 If you run a self-managed instance with 50 or more users on the Free tier
 ([either Community Edition or unlicensed Enterprise Edition](https://about.gitlab.com/install/ce-or-ee/)),
 you can request a free instance review.