IRC clients - remove #solus channel recommendations

[TraceyC77]

Remove IRC clients suggesting the #solus channel when first set up

We have moved support to Matrix We are no longer actively talking or moderating those channels

• [x] Hexchat https://github.com/getsolus/packages/pull/4300
• [ ] Telepathy
• [x] irssi
• [x] quassel
• [x] kvirc
• [x] konversation

[TraceyC77]

Verified Konversation doesn't suggest any channels It auto-joins #konversation only

[androidnisse]

Verifeid irssi, quassel and kvirc. No suggestions for #solus. I have removed a patch for hexchat that suggested #solus

[ZachBacon]

I don't see libtelepathy-idle, nor polari been modified to suggest #solus, but that's just on a cursory search of the package in git.