Remove free CI/CD notes from documentation

doc/ci/ci_cd_for_external_repos/index.md

@@ -6,10 +6,6 @@ type: index, howto
 
 >[Introduced][ee-4642] in [GitLab Premium][eep] 10.6.
 
-NOTE: **Note:**
-This feature [is available for free](https://about.gitlab.com/blog/2019/09/09/ci-cd-github-extended-again/) to
-GitLab.com users until March 22nd, 2020.
-
 GitLab CI/CD can be used with:
 
 - [GitHub](github_integration.md).

doc/user/project/repository/repository_mirroring.md

@@ -110,9 +110,6 @@ The repository will push soon. To force a push, click the appropriate button.
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/51) in GitLab Enterprise Edition 8.2.
 > - [Added Git LFS support](https://gitlab.com/gitlab-org/gitlab/issues/10871) in [GitLab Starter](https://about.gitlab.com/pricing/) 11.11.
 
-NOTE: **Note:** This feature [is available for free](https://gitlab.com/gitlab-org/gitlab/issues/10361) to
-GitLab.com users until March 22nd, 2020.
-
 You can set up a repository to automatically have its branches, tags, and commits updated from an
 upstream repository.