Deletes the specified cluster subnet group.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/redshift/delete-cluster-subnet-group.html
| aws redshift delete-cluster-subnet-group --cluster-subnet-group-name mysubnetgroup |
| delete-cluster-subnet-group — AWS CLI 1.16.13 Command Reference : http://docs.aws.amazon.com/cli/latest/reference/redshift/delete-cluster-subnet-group.html |