Revert of Add DEPS.chromium for recursive DEPS tracking. (patchset #1 …

…id:1 of https://codereview.chromium.org/2880293002/ )

Reason for revert:
Going a different way with this, as Chromium don't want the additional files.

Original issue's description:
> Add DEPS.chromium for recursive DEPS tracking.
>
> DEPS.chromium allows the Chromium build system's DEPS to recurse into V8's own
> dependencies. Initially, this is populated with some tests files for the ARM64
> simulator.
>
> BUG=chromium:718439
>
> Review-Url: https://codereview.chromium.org/2880293002
> Cr-Commit-Position: refs/heads/master@{#45310}
> Committed: https://chromium.googlesource.com/v8/v8/+/f8a6c6c48e79ef4267d03c80aa768e8362341e4a

[email protected],[email protected]
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:718439

Review-Url: https://codereview.chromium.org/2891323002
Cr-Commit-Position: refs/heads/master@{#45420}