[Merge] ~mwhudson/livecd-rootfs/+git/livecd-rootfs:no-snaps-ubuntu-cpc-minimized into livecd-rootfs:ubuntu/master

[Steve Langasek]

Review: Disapprove

superseded by https://code.launchpad.net/~tobijk/livecd-rootfs/+git/livecd-rootfs/+merge/365878
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https://code.launchpad.net/~mwhudson/livecd-rootfs/+git/livecd-rootfs/+merge/364222
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