Deletes a specified DB parameter group. The DB parameter group to be deleted can't be associated with any DB instances.
rds_delete_db_parameter_group(DBParameterGroupName)
[required] The name of the DB parameter group.
Constraints:
Must be the name of an existing DB parameter group
You can't delete a default DB parameter group
Can't be associated with any DB instances
svc$delete_db_parameter_group( DBParameterGroupName = "string" )