gcloud beta sql blue-green-deployments delete

INFORMATION
gcloud beta sql blue-green-deployments delete is not available in universe domain universe.
NAME
gcloud beta sql blue-green-deployments delete - deletes a Cloud SQL blue-green deployment
SYNOPSIS
gcloud beta sql blue-green-deployments delete DEPLOYMENT [--async] [--delete-old-source] [--region=REGION] [GCLOUD_WIDE_FLAG …]
DESCRIPTION
(BETA) Deletes a Cloud SQL blue-green deployment.
EXAMPLES
To delete a blue-green deployment named my-deployment in region us-central1: 
gcloud beta sql blue-green-deployments delete my-deployment --region=us-central1

To delete a blue-green deployment and delete the old source instance after a successful switchover: 

gcloud beta sql blue-green-deployments delete my-deployment --region=us-central1 --delete-old-source
POSITIONAL ARGUMENTS
DEPLOYMENT
The ID of the blue-green deployment.
FLAGS
--async
Return immediately, without waiting for the operation in progress to complete.
--delete-old-source
Delete the old source instance. This flag is only applicable when deleting a deployment after a switchover has been successfully completed.

If deleting a deployment before switchover or after a failed switchover, the target instance will be deleted by default, and this flag will be ignored.

--region=REGION
Regional location (e.g. asia-east1, us-east1). See the full list of regions at https://cloud.google.com/sql/docs/instance-locations.
GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES
This command is currently in beta and might change without notice. This variant is also available: 
gcloud alpha sql blue-green-deployments delete