Remove the Blockade Lambda functions.

def remove_lambda_functions():
    """Remove the Blockade Lambda functions."""
    logger.debug("[#] Removing the Lambda functions")
    client = boto3.client('lambda', region_name=PRIMARY_REGION)

    responses = list()
    for label in LAMBDA_FUNCTIONS:
        try:
            response = client.delete_function(
                FunctionName=label,
            )
        except client.exceptions.ResourceNotFoundException:
            logger.info("[!] Function %s already removed" % (label))
            continue
        responses.append(response)
        logger.debug("[*] Removed %s function" % (label))
    logger.info("[#] Successfully removed Lambda functions")

    return responses