linux-firmware: remove .bbappend

Originally added to suppress build error "ERROR: QA Issue:
linux-firmware: Files/directories were installed but not shipped in any
package."

Change-Id: I23dbce6bd6026627899d0b2355d34f1a435ad7a2
Reviewed-by: Samuli Piippo <samuli.piippo@qt.io>

meta-boot2qt-distro/recipes-kernel/linux-firmware/linux-firmware_git.bbappend

-############################################################################
-##
-## Copyright (C) 2016 The Qt Company Ltd.
-## Contact: https://www.qt.io/licensing/
-##
-## This file is part of the Boot to Qt meta layer.
-##
-## $QT_BEGIN_LICENSE:GPL$
-## Commercial License Usage
-## Licensees holding valid commercial Qt licenses may use this file in
-## accordance with the commercial license agreement provided with the
-## Software or, alternatively, in accordance with the terms contained in
-## a written agreement between you and The Qt Company. For licensing terms
-## and conditions see https://www.qt.io/terms-conditions. For further
-## information use the contact form at https://www.qt.io/contact-us.
-##
-## GNU General Public License Usage
-## Alternatively, this file may be used under the terms of the GNU
-## General Public License version 3 or (at your option) any later version
-## approved by the KDE Free Qt Foundation. The licenses are as published by
-## the Free Software Foundation and appearing in the file LICENSE.GPL3
-## included in the packaging of this file. Please review the following
-## information to ensure the GNU General Public License requirements will
-## be met: https://www.gnu.org/licenses/gpl-3.0.html.
-##
-## $QT_END_LICENSE$
-##
-############################################################################
-
-LICENSE_CREATE_PACKAGE = "0"