Delete a security group from your account.

        :type name: string
        :param name: The name of the security group to delete.

        :type group_id: string
        :param group_id: The ID of the security group to delete within
          a VPC.

        :rtype: bool
        :return: True if successful.

def delete_security_group(self, name=None, group_id=None):
        """
        Delete a security group from your account.

        :type name: string
        :param name: The name of the security group to delete.

        :type group_id: string
        :param group_id: The ID of the security group to delete within
          a VPC.

        :rtype: bool
        :return: True if successful.
        """
        params = {}

        if name is not None:
            params['GroupName'] = name
        elif group_id is not None:
            params['GroupId'] = group_id

        return self.get_status('DeleteSecurityGroup', params, verb='POST')