Update detects leftovers from removed kernel

[Takakage]

See Yochanan’s advice from a few years back:

Updating linux initcpios... errors for old uninstalled kernel versions

Just remove the old presets from /etc/mkinitcpio.d/. They’re left over purposely in case one removes a kernel then later reinstalls it so the same settings are intact. Please also see my edit to your first post.