Update servers.md

Removal of port80.

networks/efnet/servers.md

@@ -12,14 +12,13 @@ EFNet has two round robin's which are accessable via irc.efnet.org (ipv4 & ipv6)
 Further, each server on the network sets it's own policies for access and for acceptable user conduct, so it's likely that not all
 servers will permit access, or even be reachable.
 
-The following is a list of all client servers seen connected as of 11 June 2021
+The following is a list of all client servers seen connected as of 06 December 2023
 
 * irc.mzima.net
 * irc.servercentral.net
 * irc.colosolutions.net
 * irc.Prison.NET
 * irc.underworld.no
-* efnet.port80.se
 * irc.homelien.no
 * irc.du.se
 * irc.choopa.net