code: def clear_frame_stats_directory(algo_name):
      """
      remove the outdated directory
      to avoid overloading the disk
  
      Parameters
      ----------
      algo_name: str
  
      Returns
      -------
      error: str
  
      """
      error = None
      algo_folder = get_algo_folder(algo_name)
      folder = os.path.join(algo_folder, "frame_stats")
      if os.path.exists(folder):
          try:
              shutil.rmtree(folder)
          except OSError:
              error = (
                  "unable to remove {}, the analyze "
                  "data will be inconsistent".format(folder)
              )
      return error
  
imports: import hashlib
  import json
  import os
  import pickle
  import shutil
  from datetime import date, datetime
  import pandas
  from catalyst.assets._assets import TradingPair
  from six import string_types
  from six.moves.urllib import request
  from catalyst.constants import DATE_FORMAT, SYMBOLS_URL
  from catalyst.exchange.exchange_errors import ExchangeSymbolsNotFound
  from catalyst.exchange.utils.serialization_utils import ExchangeJSONEncoder, ExchangeJSONDecoder
  from catalyst.utils.memoize import weak_lru_cache
  from catalyst.utils.paths import data_root, ensure_directory, last_modified_time
label_desc: Use image node_id 18 for calling a global function with example usage: clear_frame_stats_directory(algo_name) and returns: error