[crypt32/tests] Don't crash on win9x

[Juan Lang]

Hi Paul, thanks very much for looking into the crypt32 tests.

-    /* Weird--bad add disposition leads to an access violation in Windows.
-     */
(snip)
+    if (!on_win9x)
+    {
+        /* Weird--bad add disposition leads to an access violation in Windows.
+         * Both tests crash on win9x
+         */

This suggests to me that the test should just be removed, as it's very
unlikely that an application will depend on such behavior.  Leaving it
around with an if (0) around it seems reasonable too.  Any of these
tests whose behavior is inconsistent across Windows versions,
especially where some Windows versions crash, are good candidates for
removal, IMO.
--Juan