Update test file

Author: VanshAgarwal24036

Lib/test/test_ctypes/test_pointers.py

@@ -3,7 +3,6 @@
 import gc
 import sys
 import unittest
-import os
 from ctypes import (CDLL, CFUNCTYPE, Structure,
                     POINTER, pointer, _Pointer,
                     byref, sizeof,