fix NoneType bug for ws_client.py microphone mode

zhaomingwork

2023-05-13 3dcaa9df2f056fefd87736f1cd1cd32679018ba9

 funasr/train/abs_model.py

@@ -1,8 +1,6 @@
from abc import ABC
from abc import abstractmethod
from typing import Tuple

import torch

from typing import Dict
from typing import Optional