Stop ignoring errors when disabling SIGPIPE

nilmdb/cmdline/cmdline.py

@@ -136,10 +136,7 @@ class Cmdline(object):
     def run(self):
         # Set SIGPIPE to its default handler -- we don't need Python
         # to catch it for us.
-        try:
-            signal.signal(signal.SIGPIPE, signal.SIG_DFL)
-        except ValueError: # pragma: no cover
-            pass
+        signal.signal(signal.SIGPIPE, signal.SIG_DFL)
 
         # Clear cached timezone, so that we can pick up timezone changes
         # while running this from the test suite.