revert: use helix as the default chat send protocol (#5736)

src/providers/twitch/TwitchIrcServer.cpp

@@ -132,14 +132,14 @@ bool shouldSendHelixChat()
 {
     switch (getSettings()->chatSendProtocol)
     {
-        case ChatSendProtocol::Default:
         case ChatSendProtocol::Helix:
             return true;
+        case ChatSendProtocol::Default:
         case ChatSendProtocol::IRC:
             return false;
         default:
             assert(false && "Invalid chat protocol value");
-            return true;
+            return false;
     }
 }