Remove setup of HAVE_OLD_CPP; it is no longer used in the Python sources.
The actual test for it is only commented out in configure.in, so it can
be re-enabled if we ever run across the need for it again.
diff --git a/config.h.in b/config.h.in
index 9c3caf0..53c263d 100644
--- a/config.h.in
+++ b/config.h.in
@@ -127,9 +127,6 @@
 /* Define this if you have the type long long */
 #undef HAVE_LONG_LONG
 
-/* Define this if you have a K&R style C preprocessor */
-#undef HAVE_OLD_CPP
-
 /* Define if your compiler supports function prototypes */
 #undef HAVE_PROTOTYPES
 
@@ -231,6 +228,11 @@
 /* Defined when any dynamic module loading is enabled */
 #undef HAVE_DYNAMIC_LOADING
 
+/* Define if i>>j for signed int i does not extend the sign bit
+   when i < 0
+*/
+#undef SIGNED_RIGHT_SHIFT_ZERO_FILLS
+
 /* The number of bytes in a char.  */
 #undef SIZEOF_CHAR