Remove unused imports in test modules.
diff --git a/Lib/test/test_filecmp.py b/Lib/test/test_filecmp.py
index f76ba0b..4739ede 100644
--- a/Lib/test/test_filecmp.py
+++ b/Lib/test/test_filecmp.py
@@ -1,5 +1,5 @@
 
-import os, filecmp, shutil, tempfile, shutil
+import os, filecmp, shutil, tempfile
 import unittest
 from test import test_support