':calls: `DELETE /repos/:owner/:repo/issues/:number/labels/:name <http://developer.github.com/v3/issues/labels>`_
:param label: :class:`github.Label.Label` or string
:rtype: None'

def remove_from_labels(self, label):

    assert isinstance(label, (github.Label.Label, str, unicode)), label
    if isinstance(label, github.Label.Label):
        label = label._identity
    else:
        label = urllib.quote(label)
    (headers, data) = self._requester.requestJsonAndCheck('DELETE', ((self.url + '/labels/') + label))
