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

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

TBR=machenbach@chromium.org,bmeurer@chromium.org
# 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}

DEPS.chromium

-# This file is used by the Chromium dependency system to pull in V8 dependencies
-# not used by Chromium directly.
-#
-# If you make a change to the dependencies below, the corresponding DEPS file
-# for v8 must also be changed.
-
-vars = {
-  "chromium_url": "https://chromium.googlesource.com",
-}
-
-deps = {
-  "src/v8/test/cctest/traces-arm64":
-    Var("chromium_url") + "/external/git.linaro.org/arm/vixl-simulator-traces.git" + "@" + "6168e7e1eec52c9cb0a62f87f94df0582dc48aa8",
-}