def unset_cookie(self, name):
        if self._cookies is None:
            self._cookies = SimpleCookie()

        self._cookies[name] = ''

        # NOTE(Freezerburn): SimpleCookie apparently special cases the
        # expires attribute to automatically use strftime and set the
        # time as a delta from the current time. We use -1 here to
        # basically tell the browser to immediately expire the cookie,
        # thus removing it from future request objects.
        self._cookies[name]['expires'] = -1
Unset a cookie in the response
dataset/ETHPy150Open falconry/falcon/falcon/response.py/Response.unset_cookie