remove test_support.TestSkipped and just use unittest.SkipTest
diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index 64c9cda..ff5c173 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -10,7 +10,7 @@
 import sys, os, time, errno
 
 if sys.platform[:3] in ('win', 'os2') or sys.platform == 'riscos':
-    raise test_support.TestSkipped("Can't test signal on %s" % \
+    raise unittest.SkipTest("Can't test signal on %s" % \
                                    sys.platform)