initrd.scripts: drop subshell in setup_squashfs_aufs

defaults/initrd.scripts

@@ -1353,7 +1353,6 @@ getdvhoff() {
 }
 
 setup_squashfs_aufs() {
-	(
 	# Setup aufs directories and vars
 	local overlay=/mnt/overlay
 	local static=/mnt/livecd
@@ -1377,7 +1376,6 @@ setup_squashfs_aufs() {
 	local new_cdroot="${NEW_ROOT}${CDROOT_PATH}"
 	[ ! -d "${new_cdroot}" ] && mkdir -p "${new_cdroot}"
 	mount --bind "${CDROOT_PATH}" "${new_cdroot}"
-	)
 }
 
 get_mounts_list()