Update Doxygen file blocks to remove copyright and license information
diff --git a/include/mbedtls/md_internal.h b/include/mbedtls/md_internal.h
index e2441bb..d051730 100644
--- a/include/mbedtls/md_internal.h
+++ b/include/mbedtls/md_internal.h
@@ -6,7 +6,8 @@
  * \warning This in an internal header. Do not include directly.
  *
  * \author Adriaan de Jong <dejong@fox-it.com>
- *
+ */
+/*
  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  *  SPDX-License-Identifier: Apache-2.0
  *