meta-digi: delete linux 5.4 recipe

No supported platform is using kernel version 5.4.

Signed-off-by: Javier Viguera <javier.viguera@digi.com>

meta-digi-arm/recipes-kernel/linux/linux-dey_5.4.bb

@@ -1,32 +0,0 @@
-# Copyright (C) 2013-2022 Digi International
-
-SUMMARY = "Linux kernel for Digi boards"
-LICENSE = "GPL-2.0-only"
-LIC_FILES_CHKSUM = "file://COPYING;md5=bbea815ee2795b2f4230826c0c6b8814"
-
-DEPENDS += "lzop-native bc-native"
-
-inherit kernel
-inherit ${@oe.utils.conditional('DEY_BUILD_PLATFORM', 'NXP', 'fsl-kernel-localversion', '', d)}
-
-SRCBRANCH = "v5.4.70/master"
-SRCREV = "${AUTOREV}"
-
-require recipes-kernel/linux/linux-dey-src.inc
-require ${@bb.utils.contains('DISTRO_FEATURES', 'virtualization', 'linux-virtualization.inc', '', d)}
-require recipes-kernel/linux/linux-trustfence.inc
-
-# Use custom provided 'defconfig' if variable KERNEL_DEFCONFIG is cleared
-SRC_URI += "${@oe.utils.conditional('KERNEL_DEFCONFIG', '', 'file://defconfig', '', d)}"
-
-# Apply configuration fragments
-do_configure:append() {
-	# Only accept fragments ending in .cfg. If the fragments contain
-	# something other than kernel configs, it will be filtered out
-	# automatically.
-	if [ -n "${@' '.join(find_cfgs(d))}" ]; then
-		${S}/scripts/kconfig/merge_config.sh -m -O ${B} ${B}/.config ${@" ".join(find_cfgs(d))}
-	fi
-}
-
-COMPATIBLE_MACHINE = "(ccimx6ul|ccimx8x|ccimx8m|ccimx6)"