def remove_outside_collaborator(self, collaborator):
assert isinstance(collaborator, github.NamedUser.NamedUser), collaborator<EOL>headers, data = self._requester.requestJsonAndCheck(<EOL>"<STR_LIT>",<EOL>self.url + "<STR_LIT>" + collaborator._identity<EOL>)<EOL>
:calls: `DELETE /orgs/:org/outside_collaborators/:username <https://developer.github.com/v3/orgs/outside_collaborators>`_
:param collaborator: :class:`github.NamedUser.NamedUser`
:rtype: None