Deletes the user attributes in a user pool as an administrator.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/cognito-idp/admin-delete-user-attributes.html
| aws cognito-idp admin-delete-user-attributes --user-pool-id MYID-123 --username test2 |
| amazon web services - AWS Cognito - Users lost "non-mutable" attribute "email_verified" - Stack Overflow : http://stackoverflow.com/a/51718774 |