Remove unused imports in test modules.
diff --git a/Lib/test/test_dircache.py b/Lib/test/test_dircache.py
index 56799da..8a80720 100644
--- a/Lib/test/test_dircache.py
+++ b/Lib/test/test_dircache.py
@@ -4,7 +4,7 @@
 """
 
 import unittest
-from test.test_support import run_unittest, TESTFN, import_module
+from test.test_support import run_unittest, import_module
 dircache = import_module('dircache', deprecated=True)
 import os, time, sys, tempfile