CentOS 5 EOL - Yum repo issue

Now that CentOS 5 has gone end of life, there's no update repos left to use:

-bash-3.2# cat /etc/redhat-release
CentOS release 5.11 (Final)
-bash-3.2# yum update
Loaded plugins: downloadonly, fastestmirror
Determining fastest mirrors
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
 Eg. Invalid release/
removing mirrorlist with no valid mirrors: /var/cache/yum/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base

All repo contents have been moved to http://vault.centos.org so to fix the problem, the other repos must be removed:

-bash-3.2# ls /etc/yum.repos.d/CentOS-
CentOS-Base.repo       CentOS-Media.repo      CentOS-Vault.repo
CentOS-Debuginfo.repo  CentOS-Sources.repo    CentOS-fasttrack.repo
-bash-3.2# ls /etc/yum.repos.d/CentOS-

Leaving only CentOS-Vault.repo:

-bash-3.2# yum update
Loaded plugins: downloadonly, fastestmirror
Determining fastest mirrors
Setting up Update Process
No Packages marked for Update
-bash-3.2#