remove support for missing ANSI C header files (limits.h, stddef.h, etc).
diff --git a/Misc/NEWS b/Misc/NEWS
index 33ff152..45068ad 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -334,6 +334,9 @@
 Build
 -----
 
+- Support for missing ANSI C header files (limits.h, stddef.h, etc) was
+  removed.
+
 - Systems requiring the D4, D6 or D7 variants of pthreads are no longer
   supported (see PEP 11).