Integrate meta-seconorth-distro/remove_wic_kirkstone

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Commit: seco-ne/yocto/layers/meta-seconorth-distro@cbebc6f9

image:wic: Removed WIC image layout file

We have a multi-image system setup that can't easily be created with the
WIC tool. Because of this, we don't support WIC images at the moment.
Remove the layout file for now.

Cherry-picked from c35a0e18898c46c27749c0b1316bdcc6ba8696fc