code: def clear_data(self):
          
          # cjshaw@mit.edu, Jan 9, 2015
          # Removes the item from AWS S3 and resets URL to ''
          odl_repo, url = get_aws_s3_handle(self._config_map)
          existing_url = self._payload.get_url_metadata().get_existing_string_values()[0]
          # try to clear from payload first, in case that fails we won't mess with AWS
          self._payload.clear_url()
          key_path = existing_url.replace(url, '')
  
          # for boto3, remove leading /
          if key_path[0] == '/':
              key_path = key_path[1::]
          odl_repo.delete_object(
              Bucket=self._config_map['s3_bucket'],
              Key=key_path
          )
docs: Removes the content data.
  
          raise:  NoAccess - ``Metadata.isRequired()`` is ``true`` or
                  ``Metadata.isReadOnly()`` is ``true``
          *compliance: mandatory -- This method must be implemented.*