update timestamp for batch inference

shixian.shi

2023-05-11 8c732716d62a2c2bdf2f302a7904f1811aa4301d

 egs/aishell/transformer/utils/prepare_checkpoint.py

@@ -1,8 +1,6 @@
import os
import shutil

from modelscope.pipelines import pipeline
from modelscope.utils.constant import Tasks
from modelscope.hub.snapshot_download import snapshot_download