Verified on 8.4.x-dev branch without applying the latest patch on it. The iss...

Verified on 8.4.x-dev branch without applying the latest patch on it. The issue is already fixed on 8.4.x-dev branch.
- Navigate to /admin/reports/status
- Check the 'Drupal Core Update Status'
- The first hyperlink for the "available updates" has been removed.
- Its appearing like this "There is a security update available for your version of Drupal. To ensure the security of your server, you should update immediately! See the available updates page for more information and to install your missing updates."
Screenshots attached for reference.