Revert "Update Lib/test/test_tempfile.py"

This reverts commit 4baeeb1.

Author: StanFromIreland

Lib/test/test_tempfile.py

@@ -1901,8 +1901,7 @@ def hook(path, *, dir_fd=None):
                 if os.path.islink(dir1):
                     os.unlink(dir1)
                     os.rename(dir1 + '_moved', dir1)
-                if os.path.exists(dir1):
-                    os.chmod(dir1, 0o700)
+                os.chmod(dir1, 0o700)
                 d1.cleanup()
 
             self.assertTrue(os.path.exists(target_file))