<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def delete_state(key, namespace=None, table_name=None, environment=None, layer=None, stage=None, shard_id=None, consistent=True, wait_exponential_multiplier=500, wait_exponential_max=5000, stop_max_delay=10000):
 """Delete Lambda state value."""

    if table_name is None:
        table_name = _state_table_name(environment=environment, layer=layer,
                                       stage=stage)

    if not table_name:
        msg = ("Can't produce state table name: unable to set state "
               "item '{}'".format(key))
        logger.error(msg)
        raise StateTableError(msg)
        return

    dynamodb = boto3.resource("dynamodb")
    table = dynamodb.Table(table_name)
    logger.info("Deleting {} in DynamoDB table {}".format(key, table_name))

    if namespace:
        key = "{}:{}".format(namespace, key)

    if shard_id:
        key = "{}:{}".format(shard_id, key)

    @retry(retry_on_exception=_is_critical_exception,
           wait_exponential_multiplier=500,
           wait_exponential_max=5000,
           stop_max_delay=10000)
    def delete_item():
        try:
            return table.delete_item(Key={"id": key})
        except Exception as err:
            if _is_dynamodb_critical_exception(err):
                raise CriticalError(err)
            else:
                raise

    resp = delete_item()

    logger.info("Response from DynamoDB: '{}'".format(resp))
    return resp