update paraformer streaming code

haoneng.lhn

2023-04-27 7584bbd6f3e321cc8bc970739a7cfce29ffcc18b

 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