Deletes a DB subnet group.
See https://paws-r.github.io/docs/rds/delete_db_subnet_group.html for full documentation.
rds_delete_db_subnet_group(DBSubnetGroupName)[required] The name of the database subnet group to delete.
You can't delete the default subnet group.
Constraints: Must match the name of an existing DBSubnetGroup. Must not be default.
Example: mydbsubnetgroup