Revert "Reland #4 of "[swarming] Use go client to collect task""

This reverts commit 8d90a80f1352aaf130ecceefb031c0e23b8bdce9.

Reason for revert: crbug.com/914009

Original change's description:
> Reland #4 of "[swarming] Use go client to collect task"
> 
> This is a reland of https://chromium-review.googlesource.com/c/chromium/tools/build/+/1367545
> 
> Enable go swarming client only in isolated script tests in chromium_test module.
> 
> Bug: 868878, 894045
> Change-Id: If96fb7fbf6dd51c38c89bca132781a8dc62faf7e
> Recipe-Nontrivial-Roll: build_limited_scripts_slave
> Reviewed-on: https://chromium-review.googlesource.com/c/1369476
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Marc-Antoine Ruel <maruel@chromium.org>
> Commit-Queue: Takuto Ikuta <tikuta@chromium.org>

TBR=maruel@chromium.org,machenbach@chromium.org,tikuta@chromium.org,jbudorick@chromium.org

Change-Id: I7e6f2669b3d605aaf810c04b47d8d330c9d1faac
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 868878, 894045
Reviewed-on: https://chromium-review.googlesource.com/c/1372370
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
122 files changed
tree: 7d8748e10e0e5f55e6f81df1f0d7951e3165d58e
  1. infra/
  2. masters/
  3. scripts/
  4. site_config/
  5. slave/
  6. tests/
  7. third_party/
  8. .gitattributes
  9. .gitignore
  10. .vpython
  11. codereview.settings
  12. DEPS
  13. environment.cfg.py
  14. LICENSE
  15. OWNERS
  16. PRESUBMIT.py
  17. README.md
  18. WATCHLISTS
README.md

build

Hi build contributor! If you do any change in scripts/master/ or touching any master's html/ directories, you must restart master.chromium.fyi first and ensure that it still works before restarting other masters.

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.