[Merge] ~xnox/ubuntu-seeds:drop-devscripts into ~ubuntu-core-dev/ubuntu-seeds/+git/ubuntu:focal

[Christian Ehrhardt ]

well, you will need two MPs.
This one here isn't bad - it just isn't complete on its own.
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https://code.launchpad.net/~xnox/ubuntu-seeds/+git/ubuntu-seeds/+merge/380715
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