Deletes a DB subnet group.
See https://www.paws-r-sdk.com/docs/neptune_delete_db_subnet_group/ for full documentation.
neptune_delete_db_subnet_group(DBSubnetGroupName)
[required] The name of the database subnet group to delete.
You can't delete the default subnet group.
Constraints:
Constraints: Must match the name of an existing DBSubnetGroup. Must not be default.
Example: mySubnetgroup