prow/github/client.go
func (c *Client) RemoveOrgMembership(org, user string) error {
	c.log("RemoveOrgMembership", org, user)
	_, err := c.request(&request{
		method:    http.MethodDelete,
		path:      fmt.Sprintf("/orgs/%s/memberships/%s", org, user),
		exitCodes: []int{204},
	}, nil)
	return err
}
func (c *Client) RemoveOrgMembership(org, user string) error {
	c.log("RemoveOrgMembership", org, user)
	_, err := c.request(&request{
		method:    http.MethodDelete,
		path:      fmt.Sprintf("/orgs/%s/memberships/%s", org, user),
		exitCodes: []int{204},
	}, nil)
	return err
}
// RemoveOrgMembership removes the user from the org.
//
// https://developer.github.com/v3/orgs/members/#remove-organization-membership