Remove unused test class

Author: barneygale

Lib/test/test_pathlib/test_pathlib_abc.py

@@ -1293,11 +1293,6 @@ def close(self):
         super().close()
 
 
-DummyPathStatResult = collections.namedtuple(
-    'DummyPathStatResult',
-    'st_mode st_ino st_dev st_nlink st_uid st_gid st_size st_atime st_mtime st_ctime')
-
-
 class DummyPath(PathBase):
     """
     Simple implementation of PathBase that keeps files and directories in