remove export kek example since it is an internal function

caam/seco/export_kek.c

@@ -1,50 +0,0 @@
-/* export_kek.c
- *
- * Copyright (C) 2006-2021 wolfSSL Inc.
- *
- * This file is part of wolfSSL.
- *
- * wolfSSL is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * wolfSSL is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
- */
-
-#include <wolfssl/options.h>
-#include <wolfssl/wolfcrypt/wc_port.h>
-#include <wolfssl/wolfcrypt/logging.h>
-#include <wolfssl/wolfcrypt/port/caam/wolfcaam.h>
-
-#include <stdio.h>
-
-int main(int argc, char** argv)
-{
-    byte kek[32];
-    byte kekSz = 32, i;
-
-    wolfSSL_Debugging_ON();
-    if (wolfCrypt_Init() != 0) {
-        printf("Could not initialize wolfSSL library!\n");
-        return -1;
-    }
-
-    XMEMSET(kek, 0, kekSz);
-    wc_SECO_ExportKEK(kek, kekSz, 0);
-    printf("exported : ");
-    for (i = 0; i < kekSz; i++)
-        printf("%02X", kek[i]);
-    printf("\n");
-
-    wolfCrypt_Cleanup();
-    return 0;
-}
-