qcacmn: wmi: Remove legacy markings

Per current guidance remove legacy markings.

Change-Id: Ic86284ff527bb55b681149e38f5c708edda5ce8b
CRs-Fixed: 2230684

wmi_unified_twt_param.h

@@ -1,9 +1,6 @@
 /*
  * Copyright (c) 2018 The Linux Foundation. All rights reserved.
  *
- * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
- *
- *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
  * above copyright notice and this permission notice appear in all