Issue #11830: Remove unnecessary introspection code in the decimal module.

Forward ported changesets b4b1f557d563 and f4adc2926bf5 by Raymond
Hettinger in branch '2.7'.
diff --git a/Misc/NEWS b/Misc/NEWS
index 620fae8..e16db92 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -53,6 +53,8 @@
 Library
 -------
 
+- Issue #11830: Remove unnecessary introspection code in the decimal module.                                                                
+
 - Issue #11703 - urllib2.geturl() does not return correct url when the original
   url contains #fragment.