Update Doxygen file blocks to remove copyright and license information
diff --git a/include/mbedtls/pk_internal.h b/include/mbedtls/pk_internal.h
index 01d0f21..3dae0fc 100644
--- a/include/mbedtls/pk_internal.h
+++ b/include/mbedtls/pk_internal.h
@@ -1,8 +1,9 @@
 /**
- * \file pk.h
+ * \file pk_internal.h
  *
  * \brief Public Key abstraction layer: wrapper functions
- *
+ */
+/*
  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  *  SPDX-License-Identifier: Apache-2.0
  *