Update index.md removed link to a page that no longer exists (#682)

Author: cottage14

content/dev/index.md

@@ -30,7 +30,6 @@ Here are links to high-level information about The ASF's infrastructure, and the
   - <a href="https://infra.apache.org/services.html">Services and tools for projects</a>
   - How to become an <a href="https://infra.apache.org/infra-volunteer.html" target="_blank">Infra Volunteer</a>
   - <a href="https://status.apache.org/" target="_blank">Host and service status monitor</a>. Infa has already been alerted if a service shows as down.
-  - <a href="https://infra.apache.org/machines.html" target="_blank">Machine and host list</a> of Apache servers
 
 Infra's <a href="https://cwiki.apache.org/confluence/display/INFRA/Index" target="_blank">Confluence Wiki area</a> has detailed technical information, script snippets, and other resources to help Project Management Committees do what they need to do.