removed the about-labels masked link.

Reason: Link redirects to the current page, not needed

content/github/managing-your-work-on-github/managing-labels.md

@@ -92,7 +92,6 @@ Deleting a label will remove the label from issues and pull requests.
 {% data reusables.project-management.delete-label %}
 
 ### Further reading
-- "[About labels](/articles/about-labels)"
 - "[Filtering issues and pull requests by labels](/articles/filtering-issues-and-pull-requests-by-labels)"{% if currentVersion == "free-pro-team@latest" or enterpriseServerVersions contains currentVersion %}
 - "[Managing default labels for repositories in your organization](/articles/managing-default-labels-for-repositories-in-your-organization)"{% endif %}{% if currentVersion == "free-pro-team@latest" %}
 - "[Encouraging helpful contributions to your project with labels](/github/building-a-strong-community/encouraging-helpful-contributions-to-your-project-with-labels)"{% endif %}