func detachPolicyFromRole(conn *iam.IAM, role string, arn string) error {
	_, err := conn.DetachRolePolicy(&iam.DetachRolePolicyInput{
		RoleName:  aws.String(role),
		PolicyArn: aws.String(arn),
	})
	if err != nil {
		return err
	}
	return nil
}
func detachPolicyFromRoles(conn *iam.IAM, roles []*string, arn string) error {
	for _, r := range roles {
		_, err := conn.DetachRolePolicy(&iam.DetachRolePolicyInput{
			RoleName:  r,
			PolicyArn: aws.String(arn),
		})
		if err != nil {
			return err
		}
	}
	return nil
}