Remove unused parseMessage function (#4968)

src/providers/twitch/IrcMessageHandler.cpp

@@ -558,39 +558,6 @@ std::vector<MessagePtr> parsePrivMessage(Channel *channel,
     return builtMessages;
 }
 
-/**
- * Parse a single IRC message into 0 or more Chatterino messages
- **/
-std::vector<MessagePtr> parseMessage(Channel *channel,
-                                     Communi::IrcMessage *message)
-{
-    assert(channel != nullptr);
-    assert(message != nullptr);
-
-    std::vector<MessagePtr> builtMessages;
-
-    auto command = message->command();
-
-    if (command == "PRIVMSG")
-    {
-        return parsePrivMessage(
-            channel, dynamic_cast<Communi::IrcPrivateMessage *>(message));
-    }
-
-    if (command == "USERNOTICE")
-    {
-        return parseUserNoticeMessage(channel, message);
-    }
-
-    if (command == "NOTICE")
-    {
-        return parseNoticeMessage(
-            dynamic_cast<Communi::IrcNoticeMessage *>(message));
-    }
-
-    return builtMessages;
-}
-
 }  // namespace
 
 namespace chatterino {