Removes the specified tag or tags from the specified customer masterkey (CMK).Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/kms/untag-resource.html
| aws kms untag-resource --tag-keys Purpose --key-id 1234abcd-12ab-34cd-56ef-1234567890ab |
| Tagging Keys - AWS Key Management Service : http://docs.aws.amazon.com/kms/latest/developerguide/tagging-keys.html |