def delete(self, callback=None):
        return self.bucket.delete_key(self.name, version_id=self.version_id, callback=callback)
Given a top-level feature (e.g., transcript), construct a BED12 entry
dataset/ETHPy150Open yyuu/botornado/botornado/s3/key.py/AsyncKey.delete--crossover with--dataset/ETHPy150Open daler/gffutils/gffutils/convert.py/to_bed12