cert_create: Remove some unused header files inclusions

The chain of trust definitions are only needed in the part of the code
dealing with the TBBR CoT (tbbr/* files).

Change-Id: I6f9a86bba4a2d16313b6842a3ec85b7c951074bc
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
diff --git a/tools/cert_create/src/main.c b/tools/cert_create/src/main.c
index 0cbd219..863db7b 100644
--- a/tools/cert_create/src/main.c
+++ b/tools/cert_create/src/main.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -19,21 +19,12 @@
 #include <openssl/sha.h>
 #include <openssl/x509v3.h>
 
-#if USE_TBBR_DEFS
-#include <tbbr_oid.h>
-#else
-#include <platform_oid.h>
-#endif
-
 #include "cert.h"
 #include "cmd_opt.h"
 #include "debug.h"
 #include "ext.h"
 #include "key.h"
 #include "sha.h"
-#include "tbbr/tbb_cert.h"
-#include "tbbr/tbb_ext.h"
-#include "tbbr/tbb_key.h"
 
 /*
  * Helper macros to simplify the code. This macro assigns the return value of