chore: drop an obsolete instance IP TODO

New instances already get their address from external_ip through the
master server's dServer, so the TODO asking to read it from config was
done. No behaviour change.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dMasterServer/InstanceManager.cpp

@@ -46,8 +46,6 @@ const InstancePtr& InstanceManager::CreateInstance(LWOMAPID mapID, LWOCLONEID cl
 			cloneID);
 		return g_Empty;
 	}
-	//TODO: Update this so that the IP is read from a configuration file instead
-
 	int softCap = 8;
 	int maxPlayers = 12;