windows: remove support for servercore 1809

[gdams]

Servercore 1809 reached EOL in October 13, 2020 so we should probably remove them.

See https://learn.microsoft.com/en-us/lifecycle/announcements/windows-server-1809-end-of-servicing
and https://learn.microsoft.com/en-us/lifecycle/announcements/revised-end-of-service-windows-10-1709

[gdams]

removed this line as it's unused

[tianon]

I think https://learn.microsoft.com/en-us/virtualization/windowscontainers/deploy-containers/base-image-lifecycle is probably a better reference for the container images specifically 😇

[tianon]

(I struggled with this same question when I did docker-library/official-images#18143, and opted, at least for now, to continue to support it as long as GitHub still does for DOI and images we maintain directly 🙈)

[gdams]

(I struggled with this same question when I did docker-library/official-images#18143, and opted, at least for now, to continue to support it as long as GitHub still does for DOI and images we maintain directly 🙈)

hmm okay, if your team is still supporting it we'll stick to the same plan.

[github-actions]

A block has been put on this Pull Request as this repository is temporarily under a code freeze due to an ongoing release cycle.

If this pull request needs to be merged during the release cycle then please comment /merge and a PMC member will be able to remove the block.

If the code freeze is over you can remove this block by commenting /thaw.

[gdams]

/merge

[github-actions]

Approval to merge during the lockdown cycle

Please can two Adoptium PMC members comment /approve?

[karianna]

/approve

[tellison]

/approve

Thank you @karianna and @tellison for your approvals, this pull request is now approved to merge during release.

[steelhead31]

/approve

[steelhead31]

Looks good

[KlwntSingh]

Hi Folks,
Windows Server 2019 is still supported with extended support. Refer - https://learn.microsoft.com/en-us/lifecycle/products/windows-server-2019.
Customer still uses 2019 Windows server images and microsoft do release security patches every Patch tuesday's.

Request to add back this container image if possible.

[karianna]

@KlwntSingh Given the limited number of customers using this combination and to reduce our maintenance burden, we won't be returning this support to Adoptium. We recommend that you start with the DockerFiles in this PR and maintain the set you need internally.