Merge branch 'patch-28' into 'master'

Remove duplicated item in Administration Documentation

See merge request gitlab-org/gitlab-ce!21933

doc/administration/index.md

@@ -118,10 +118,9 @@ created in snippets, wikis, and repos.
 ## Continuous Integration settings
 
 - [Enable/disable GitLab CI/CD](../ci/enable_or_disable_ci.md#site-wide-admin-setting): Enable or disable GitLab CI/CD for your instance.
-- [GitLab CI/CD admin settings](../user/admin_area/settings/continuous_integration.md): Define max artifacts size and expiration time.
+- [GitLab CI/CD admin settings](../user/admin_area/settings/continuous_integration.md): Enable or disable Auto DevOps site-wide and define the artifacts' max size and expiration time.
 - [Job artifacts](job_artifacts.md): Enable, disable, and configure job artifacts (a set of files and directories which are outputted by a job when it completes successfully).
 - [Job traces](job_traces.md): Information about the job traces (logs).
-- [Artifacts size and expiration](../user/admin_area/settings/continuous_integration.md#maximum-artifacts-size): Define maximum artifacts limits and expiration date.
 - [Register Shared and specific Runners](../ci/runners/README.md#registering-a-shared-runner): Learn how to register and configure Shared and specific Runners to your own instance.
 - [Shared Runners pipelines quota](../user/admin_area/settings/continuous_integration.md#shared-runners-pipeline-minutes-quota): Limit the usage of pipeline minutes for Shared Runners.
 - [Enable/disable Auto DevOps](../topics/autodevops/index.md#enabling-auto-devops): Enable or disable Auto DevOps for your instance.