To delete files that are in the manifest
        :param excludes_files: list : files to not delete
        :return:

def purge_files(self, exclude_files=["index.html", "error.html"]):
        """
        To delete files that are in the manifest
        :param excludes_files: list : files to not delete
        :return:
        """
        for chunk in utils.chunk_list(self._get_manifest_data(), 1000):
            try:
                self.s3.delete_objects(
                    Bucket=self.sitename,
                    Delete={
                        'Objects': [{"Key": f} for f in chunk
                                    if f not in exclude_files]
                    }
                )
            except Exception as ex:
                pass