Delete some code from X509_PURPOSE_cleanup(3) that had no effect:

it called a function on static objects that returns right away
unless the argument is dynamically allocated.
OK jsing@ tb@

The useless code was independently discovered while writing documentation.
This commit is identical to:

OpenSSL commit fa3a0286d178eb3b87bf2eb5fd7af40f81453314
Author: Kurt Cancemi <kurt at x64architecture dot com>
Date:   Wed Jun 8 19:15:38 2016 -0400

1 files changed, 1 insertions, 5 deletions

diff --git a/src/lib/libcrypto/x509/x509_purp.c b/src/lib/libcrypto/x509/x509_purp.c
index c81e043f9d..aff9f607bc 100644
--- a/src/lib/libcrypto/x509/x509_purp.c
+++ b/src/lib/libcrypto/x509/x509_purp.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: x509_purp.c,v 1.4 2021/03/19 18:52:14 tb Exp $ */
+/* $OpenBSD: x509_purp.c,v 1.5 2021/07/23 20:40:49 schwarze Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2001.
  */
@@ -295,11 +295,7 @@ xptable_free(X509_PURPOSE *p)
 void
 X509_PURPOSE_cleanup(void)
 {
-        unsigned int i;
-
         sk_X509_PURPOSE_pop_free(xptable, xptable_free);
-        for(i = 0; i < X509_PURPOSE_COUNT; i++)
-                xptable_free(xstandard + i);
         xptable = NULL;
 }