class_docstr: loss util unittest
docstr: tear down 
docstr_tok: ["tear","down"]
code: def tearDown(self):
      """tear down"""
  
file_path: delta/delta/utils/loss/loss_utils_test.py
imports: import numpy
  import delta.compat
  from absl import logging
  from delta.utils.loss import loss_utils
label_desc: Use image node_id 2 for calling the LossUtilTest obj's underlying member method code with example usage: obj.tearDown() without return types