Remove experimental IRC support (#5547)

src/controllers/commands/builtin/twitch/SendWhisper.cpp

@@ -9,8 +9,6 @@
 #include "messages/MessageElement.hpp"
 #include "providers/bttv/BttvEmotes.hpp"
 #include "providers/ffz/FfzEmotes.hpp"
-#include "providers/irc/IrcChannel2.hpp"
-#include "providers/irc/IrcServer.hpp"
 #include "providers/twitch/api/Helix.hpp"
 #include "providers/twitch/TwitchAccount.hpp"
 #include "providers/twitch/TwitchIrcServer.hpp"
@@ -242,17 +240,6 @@ QString sendWhisper(const CommandContext &ctx)
         return "";
     }
 
-    // we must be on IRC
-    auto *ircChannel = dynamic_cast<IrcChannel *>(ctx.channel.get());
-    if (ircChannel == nullptr)
-    {
-        // give up
-        return "";
-    }
-
-    auto *server = ircChannel->server();
-    server->sendWhisper(target, message);
-
     return "";
 }