'Deletes a specified Amazon Redshift parameter group.
:type parameter_group_name: string
:param parameter_group_name:
The name of the parameter group to be deleted.
Constraints:
+ Must be the name of an existing cluster parameter group.
+ Cannot delete a default cluster parameter group.'

def delete_cluster_parameter_group(self, parameter_group_name):

    params = {'ParameterGroupName': parameter_group_name}
    return self._make_request(action='DeleteClusterParameterGroup', verb='POST', path='/', params=params)
