Remove duplicate reusable inGitHub-hosted runners concept page

### Why

`content/actions/concepts/runners/github-hosted-runners.md` includes the
`reusables.actions.enterprise-github-hosted-runners` reusable twice — once
before the `## Overview of GitHub-hosted runners` heading and again
immediately after it — causing the same banner to render twice on
https://docs.github.com/en/actions/concepts/runners/github-hosted-runners.

### What

Removes the second (duplicate) occurrence of the reusable. The first
occurrence is unchanged.

No other edits.

Author: QuantuM

content/actions/concepts/runners/github-hosted-runners.md

@@ -25,9 +25,7 @@ contentType: concepts
 
 {% data reusables.actions.enterprise-github-hosted-runners %}
 
-## Overview of {% data variables.product.prodname_dotcom %}-hosted runners
-
-{% data reusables.actions.enterprise-github-hosted-runners %}
+## Overview of {% data variables.product.prodname_dotcom %}-hosted runner
 
 Runners are the machines that execute jobs in a {% data variables.product.prodname_actions %} workflow. For example, a runner can clone your repository locally, install testing software, and then run commands that evaluate your code.