Merge branch 'docs-remove-overview-nick' into 'master'

Doc: Remove unneeded Overview header from pages

See merge request gitlab-org/gitlab!43777

doc/ci/environments/protected_environments.md

@@ -9,8 +9,6 @@ type: concepts, howto
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/6303) in [GitLab Premium](https://about.gitlab.com/pricing/) 11.3.
 
-## Overview
-
 [Environments](../environments/index.md) can be used for different reasons:
 
 - Some of them are just for testing.

doc/user/application_security/container_scanning/index.md

@@ -9,8 +9,6 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/3672) in [GitLab Ultimate](https://about.gitlab.com/pricing/) 10.4.
 
-## Overview
-
 Your application's Docker image may itself be based on Docker images that contain known
 vulnerabilities. By including an extra job in your pipeline that scans for those vulnerabilities and
 displays them in a merge request, you can use GitLab to audit your Docker-based apps.