This reverts commit e9ece0f581.
Reason for revert: broke infra presubmits:
https://ci.chromium.org/p/infra/builders/try/infra-try-presubmit
Original change's description:
> Reland "Remove Python 2 support for PRESUBMIT.py"
>
> This is a reland of commit 8454fc2458
>
> Original change's description:
> > Remove Python 2 support for PRESUBMIT.py
> >
> > The presubmit system still supports invoking PRESUBMIT.py files using
> > Python 2. This has recently been turned off on the bots so this change
> > removes support more completely.
> >
> > There are still some python3 parameters being passed around - it seemed
> > better to do the simplest possible removal now, with a follow-up change
> > to remove more support code after this has sat for a while.
> >
> > Tests run from PRESUBMIT.py files could still be run using Python 2, but
> > those should also have been addressed already. Removing support for that
> > will be done in a subsequent change.
> >
> > Bug: 1207012
> > Change-Id: Id244d547a04438f83734dba269c3cc180c148b37
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4315183
> > Reviewed-by: Aravind Vasudevan <aravindvasudev@google.com>
> > Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
>
> Bug: 1207012
> Change-Id: If542cac21d8ec8704b28d03fd8407c5c2899ca2c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4317177
> Reviewed-by: Aravind Vasudevan <aravindvasudev@google.com>
> Commit-Queue: Aravind Vasudevan <aravindvasudev@google.com>
> Auto-Submit: Josip Sokcevic <sokcevic@chromium.org>
Bug: 1207012
Change-Id: Iebf76d9e2580761fc773791bac07439160503c98
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4323198
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Josip Sokcevic <sokcevic@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
48d8e90bd4