Update _index.md

removed mention of IRC chat. Links are dead. Until its well established that we have an IRC chat that works it is best practice to just not have anything there

Author: loomhigh

content/resources/_index.md

@@ -5,10 +5,6 @@ title: Resources
 
 * Regular [social events](/events/_index.md)
 * [Mailing lists](mailing-list.md) - over 350 people.
-* IRC Chat: [#plug on irc.plug.org.au](irc.md)
-  * We run an IRC channel on [UNIIRC](https://www.uniirc.com/).
-  * To join us on IRC connect to the server irc.plug.org.au.
-  * Then join the channel #plug
 * [Mumble](https://www.mumble.info/) Chat: #plug on mumble.plug.org.au
 * Video recordings and streaming on [YouTube](https://www.youtube.com/user/PerthLinuxUsersGroup) care of our own [AV project](mailing-list.md#av)
 * Collaboration with other organisations including: