gluon-core: remove sysconfig.sh

package/gluon-core/files/lib/gluon/functions/sysconfig.sh

-SYSCONFIGDIR=/lib/gluon/core/sysconfig
-
-
-sysconfig() {
-	cat "$SYSCONFIGDIR/$1" 2>/dev/null
-}
-
-sysconfig_isset() {
-	test -e "$SYSCONFIGDIR/$1"
-}
-
-sysconfig_set() {
-	echo -n "$2" > "$SYSCONFIGDIR/$1"
-}
-
-sysconfig_unset() {
-	rm -f "$SYSCONFIGDIR/$1"
-}