[Codemod][[codemod] Replace third-party mock with unittest.mock] caffe2/caffe2 (pytorch#106541)

Reviewed By: thechrisu

Differential Revision: D47909974

Pull Request resolved: pytorch#106541
Approved by: https://github.com/thechrisu

Author: jermenkoo

caffe2/python/data_parallel_model_test.py

@@ -9,7 +9,7 @@
 import tempfile
 import unittest
 import time
-from mock import Mock
+from unittest.mock import Mock
 from hypothesis import assume, given, settings
 import hypothesis.strategies as st