code: def delete_by_hash(self, file_hash):
          
          full_path = self.file_path_from_hash(file_hash)
  
          return self.delete_by_path(full_path)
docs: Remove file/archive by it's `file_hash`.
  
          Args:
              file_hash (str): Hash, which is used to find the file in storage.
  
          Raises:
              IOError: If the file for given `file_hash` was not found in \
                       storage.