Rm _CRT_SECURE_NO_DEPRECATE for programs

(Already in config.h.)
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index 1d9c144..ba00dc3 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -23,16 +23,12 @@
  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef _CRT_SECURE_NO_DEPRECATE
-#define _CRT_SECURE_NO_DEPRECATE 1
-#endif
+#include "polarssl/config.h"
 
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
 
-#include "polarssl/config.h"
-
 #if !defined(POLARSSL_X509_CRT_WRITE_C) ||                                  \
     !defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_FS_IO) ||      \
     !defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_CTR_DRBG_C) ||        \