code: def delete_io( hash ):
      
      global CACHE_
      load_cache(True)
      record_used('cache', hash)
      num_deleted = len(CACHE_['cache'].get(hash, []))
      if hash in CACHE_['cache']:
          del CACHE_['cache'][hash]
      write_out()
      return num_deleted
docs: Deletes records associated with a particular hash
  
      :param str hash: The hash
  
      :rtype int: The number of records deleted