def remove_from_subscriptions(self, subscription):
        """
        :calls: `DELETE /user/subscriptions/:owner/:repo <http://developer.github.com/v3/activity/watching>`_
        :param subscription: :class:`github.Repository.Repository`
        :rtype: None
        """
        assert isinstance(subscription, github.Repository.Repository), subscription
        headers, data = self._requester.requestJsonAndCheck(
            "DELETE",
            "/user/subscriptions/" + subscription._identity
        )