Revert "[weblayer, skew tests] Add CIPD metadata to step_metadata"

This reverts commit d37f5069b5b2060363168184fb674aedafd5a09d.

Reason for revert: Appears to be causing flake in expectation files and breaking rolls, for example https://crrev.com/i/3402024.

Original change's description:
> [weblayer, skew tests] Add CIPD metadata to step_metadata
>
> We plan on using a floating reference for downloading CIPD packages
> in skew tests configurations. By using a floating reference we can
> refresh skew tests without having to land CL's in src/. We would just
> change the CIPD package which the floating reference points to in
> the CIPD server. This change will expose information about the CIPD
> packages for a test suite. If we add a tag to the CIPD package
> specifying which Chromium version it contains, then users
> can look in the test suite metadata and find out which version is being
> skew tested by the builder.
>
> Bug: 1147459, 1147455, 1099017, 1041619
> Change-Id: If0ca9d6e94aae2c05225892a280658a2948f279b
> Recipe-Nontrivial-Roll: chrome_release
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/build/+/2533379
> Commit-Queue: Rakib Hasan <rmhasan@google.com>
> Reviewed-by: Michael Moss <mmoss@chromium.org>

TBR=mmoss@chromium.org,rmhasan@google.com,infra-scoped@luci-project-accounts.iam.gserviceaccount.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1147459
Bug: 1147455
Bug: 1099017
Bug: 1041619

Recipe-Nontrivial-Roll: chrome_release
Change-Id: Ie4efb6a0b617c4135e0cadec95014747728ef465
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/build/+/2537720
Commit-Queue: Michael Moss <mmoss@chromium.org>
Reviewed-by: Michael Moss <mmoss@chromium.org>
Auto-Submit: Michael Moss <mmoss@chromium.org>
8 files changed
tree: 0b3b83302e3e2e4f4000e37afdb80ca3166846f8
  1. infra/
  2. recipes/
  3. scripts/
  4. site_config/
  5. third_party/
  6. .gitattributes
  7. .gitignore
  8. .style.yapf
  9. .vpython
  10. .yapfignore
  11. codereview.settings
  12. CROS_OWNERS
  13. DEPS
  14. environment.cfg.py
  15. LICENSE
  16. OWNERS
  17. PRESUBMIT.py
  18. README.md
  19. WATCHLISTS
README.md

Recipes

If you're here to make a change to ‘recipes’ (the code located in scripts/slave/recipes*), please take a look at the README for more information pertaining to recipes.

Style

The preferred style is PEP8 with two-space indent; that is, the Chromium Python style. Functions use lowercase_with_underscores, with the exception of the special functions RunSteps and RunTests in recipes. Use yapf (git cl format --no-clang-format) to autoformat new code.