def remove_membership(self, member):
assert isinstance(member, github.NamedUser.NamedUser), member<EOL>headers, data = self._requester.requestJsonAndCheck(<EOL>"<STR_LIT>",<EOL>self.url + "<STR_LIT>" + member._identity<EOL>)<EOL>
:calls: `DELETE /teams/:team_id/memberships/:username <https://developer.github.com/v3/teams/members/#remove-team-membership>`
:param member:
:return: