Remove pxe article from da_DK

[carlavilla]

Summary

Remove pxe article from da_DK.

There's only one article in the da_DK, and it's very outdated... maybe it's a good idea to remove da_DK.

PR: 160698

Test Plan

Compile the website

[bcr]

Yes, it can go, since the original one was deleted a while ago.