coreos-kernel: simplify by dropping use flags

The audit and selinux features are now always on for amd64 and always
off for arm64, we don't need to toggle this any more. Besides, tweaking
the configuration from what is provided in the defconfig has caused
confusion in the past so it isn't a great scheme to preserve.

sdk_container/src/third_party/coreos-overlay/eclass/coreos-kernel.eclass

@@ -18,7 +18,7 @@ HOMEPAGE="http://www.kernel.org"
 LICENSE="GPL-2 freedist"
 SLOT="0/${PVR}"
 SRC_URI=""
-IUSE="audit selinux"
+IUSE=""
 
 DEPEND="
 	app-arch/gzip
@@ -215,14 +215,6 @@ coreos-kernel_src_prepare() {
 }
 
 coreos-kernel_src_configure() {
-	if ! use audit; then
-		sed -i -e '/^CONFIG_CMDLINE=/s/"$/ audit=0"/' build/.config || die
-	fi
-	if ! use selinux; then
-		sed -i -e '/CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE/d' build/.config || die
-		echo CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE=0 >> build/.config || die
-	fi
-
 	# Use default for any options not explitly set in defconfig
 	kmake olddefconfig
 

sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/generic/package.use

@@ -2,7 +2,6 @@
 coreos-base/coreos	    selinux
 sys-apps/dbus               selinux
 sys-apps/systemd            selinux
-sys-kernel/coreos-kernel    selinux
 
 # Enable SELinux for coreutils
 sys-apps/coreutils	    selinux

sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.use

@@ -38,8 +38,5 @@ dev-util/pkgconfig internal-glib
 # minimize risk removing unneeded patches and networking support
 app-shells/bash -net vanilla
 
-# enable audit subsystem by default
-sys-kernel/coreos-kernel audit
-
 # disable nss utilities
 dev-libs/nss -utils