[CentOS-mirror] Remove ca.mirror.babylon.network

Tim Semeijn kirjoitti 16.7.2017 klo 3.49:
> We will soon decommission our Canadian mirror due to restructuring.
> Please remove the following server from the mirrorlist:
> 
> http://ca.mirror.babylon.network/centos
> https://ca.mirror.babylon.network/centos
> ftp://ca.mirror.babylon.network/centos
> rsync://ca.mirror.babylon.network/centos
> 
> Our French mirrors will remain active.

This mirror has now been marked as 'Gone' and will no longer show up on 
the mirrorlist. Thank you for the time you provided this mirror.