Revert "[omnibox] Add 'de' and 'zh-CN' files; fix translation expectations"

This reverts commit 0f91ab0b.

Reason for revert: breaking pipeline: crbug/1234376

Original change's description:
> [omnibox] Add 'de' and 'zh-CN' files; fix translation expectations
>
> This CL adds placeholder .xtb files for 'de' and 'zh-CN', with
> appropriate hooks in the .grd file. Pedal synonyms translation
> expectations (.pyl) language list is also updated to reflect the
> latest expectations. Existing placeholder .xtb files are kept so
> as to not disrupt in-process translation requests.
>
> Bug: 893183, 1224679
> Change-Id: I97b56707bd30130cf8b87616302d0ef1b762f0e1
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3052576


> Commit-Queue: Orin Jaworski <orinj@chromium.org>
> Reviewed-by: Angela Yoeurng <yoangela@chromium.org>
> Reviewed-by: Samuel Huang <huangs@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#906352}

Bug: 893183, 1224679, 1234376
Change-Id: I6ba59af2d7aff8c7695f58b5c7344ee586b80910
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3059492
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Ben Mason <benmason@chromium.org>
Commit-Queue: Ben Mason <benmason@chromium.org>
Cr-Commit-Position: refs/heads/master@{#906684}