Get rid of useless string import, as reported by Neal Norwitz's PyChecker.py
on c.l.py.
diff --git a/Misc/ACKS b/Misc/ACKS
index ce2267f..d5673bb 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -281,6 +281,7 @@
 Hrvoje Niksic
 Bill Noon
 Stefan Norberg
+Neal Norwitz
 Jeffrey Ollie
 Nigel O'Brian
 Tim O'Malley