Incompatible with Python 2

[TimeLooper]

    def handle_error(self):
        t, v = sys.exc_info()[:2]
        if t is SystemExit:
            raise t(v)
        elif t in (OSError, ConnectionAbortedError):
            # close after peer disconnection
            self.close()
        else:
            asynchat.async_chat.handle_error(self)

Why is there special handling for OSError and ConnectionAbortedError here? This code is incompatible with Python 2. Can I remove it?