fixup commit "arch-nspawn: get all mirrors from host"

In commit d9b7350448, a line was deleted
that had a shellcheck ignore marker, but the marker itself was left in
(and had nothing to do). So, remove it.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

arch-nspawn.in

@@ -60,7 +60,6 @@ fi
 
 # shellcheck disable=2016
 host_mirrors=($($pacconf_cmd --repo extra Server 2> /dev/null | sed -r 's#(.*/)extra/os/.*#\1$repo/os/$arch#'))
-# shellcheck disable=2016
 
 # {{{ functions
 build_mount_args() {