Remove unused imports in test modules.
diff --git a/Lib/test/test_structmembers.py b/Lib/test/test_structmembers.py
index c196cc5..d1b33a1 100644
--- a/Lib/test/test_structmembers.py
+++ b/Lib/test/test_structmembers.py
@@ -5,7 +5,7 @@
     LONG_MAX, LONG_MIN, ULONG_MAX, \
     LLONG_MAX, LLONG_MIN, ULLONG_MAX
 
-import warnings, exceptions, unittest, sys
+import unittest
 from test import test_support
 
 ts=test_structmembersType(False, 1, 2, 3, 4, 5, 6, 7, 8,