code: def prune_cached(values):
      
      import os
      config_path = os.path.expanduser('~/.config/blockade')
      file_path = os.path.join(config_path, 'cache.txt')
      if not os.path.isfile(file_path):
          return values
      cached = [x.strip() for x in open(file_path, 'r').readlines()]
      output = list()
      for item in values:
          hashed = hash_values(item)
          if hashed in cached:
              continue
          output.append(item)
      return output
docs: Remove the items that have already been cached.