Remove archiso_shutdown
The archiso_shutdown hook has been obsolete since mkinitcpio 16 (from 2013), see https://lists.archlinux.org/pipermail/arch-dev-public/2013-December/025742.html.
Let's remove it.
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The archiso_shutdown hook has been obsolete since mkinitcpio 16 (from 2013), see https://lists.archlinux.org/pipermail/arch-dev-public/2013-December/025742.html.
Let's remove it.