This reverts commit 8baaec47.

Reason for revert: Speculative, to see if this unbreaks
https://ci.chromium.org/p/infra/builders/try/ChromiumOS%20downstream%20Recipe%20Roll%20tester%20from%20Depot%20Tools

Original change's description:
> repo: pull in updates from latest release
> 
> These are mostly about rolling in Python 3 encoding fixes.
> 
> Bug: None
> Test: `repo sync` works w/Python 3
> Change-Id: I7d749a3a62523a7c802fb0ed7dcd383868df1d6f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1809420
> Commit-Queue: Mike Frysinger <vapier@chromium.org>
> Reviewed-by: Alex Klein <saklein@chromium.org>

TBR=vapier@chromium.org,saklein@chromium.org

Change-Id: I7b446fe0460390dcefe6248f1ef7a004335bb796
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: None
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1814467Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>