resolved keyboard navigation feedback

Author: PentesterPriyanshu

js/utils/keyboardNav.js

@@ -1,13 +1,3 @@
-// Copyright (c) 2024 Walter Bender
-//
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the The GNU Affero General Public
-// License as published by the Free Software Foundation; either
-// version 3 of the License, or (at your option) any later version.
-//
-// You should have received a copy of the GNU Affero General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, 51 Franklin Street, Suite 500 Boston, MA 02110-1335 USA
 
 /**
  * Keyboard navigation module for Music Blocks