Hi,
For many days (I think more than a month), when I run yum search command, I get this error

Loading mirror speeds from cached hostfile
epel/metalink                                                                                    | 5.5 kB     00:00
 * epel: ftp.cuhk.edu.hk
 * sl: ftp.scientificlinux.org
 * sl-security: ftp.scientificlinux.org
epel                                                                                             | 4.2 kB     00:00
http://ftp.cuhk.edu.hk/pub/linux/fedora-epel/6/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel                                                                                             | 3.9 kB     00:00
epel/primary_db                                                                                  | 5.7 MB     01:35
sl                                                                                               | 3.5 kB     00:00
sl-livecd-extra                                                                                  | 1.4 kB     00:00
sl-livecd-extra/primary                                                                          |  29 kB     00:00
sl-livecd-extra                                                                                                 100/100
sl-security                                                                                      | 3.0 kB     00:00

If that link is dead, How can i remove that?
 
Regards,
Mahmood