This reverts commit e38cf570.

Reason for revert: likely broke bot_update on win CQ bots:
https://ci.chromium.org/buildbot/tryserver.chromium.win/win7_chromium_rel_ng/154654
https://bugs.chromium.org/p/chromium/issues/detail?id=837321

Original change's description:
> Reland "bot_update: Patch on gclient by default."
> 
> This is a reland of 355b11a3
> 
> Original change's description:
> > bot_update: Patch on gclient by default.
> > 
> > See [4] for the design doc for this change.
> > 
> > We're moving the patching logic from bot_update to gclient.
> > This way we can test patches of dependencies that modify their DEPS
> > files as well, for example when ANGLE uploads a patch that modifies
> > DEPS files to be tested by a Chromium trybot.
> > 
> > Chromium Linux CQ and Angle trybots are already running this way
> > (see [1] and [2]) and a PSA has already been sent [3]
> > 
> > [1] https://chromium.googlesource.com/chromium/src/+/master/infra/config/global/cr-buildbucket.cfg#214
> > [2] https://chromium.googlesource.com/angle/angle/+/infra/config/cr-buildbucket.cfg#105
> > [3] https://groups.google.com/a/google.com/forum/#!topic/chrome-infra/FVHN2kdUX4I
> > [4] https://docs.google.com/document/d/1GSTw4ysm5AYjNR6vMA7NJUxLK2VN9IpOEp_v0u-wyOE/edit?ts=5ad78165#
> > 
> > Bug: 643346
> > Change-Id: Ic9a9dcfae86aca730d35fbb26c26b21135e05bf3
> > Recipe-Nontrivial-Roll: skia
> > Recipe-Nontrivial-Roll: infra
> > Recipe-Nontrivial-Roll: build_limited_scripts_slave
> > Recipe-Nontrivial-Roll: skiabuildbot
> > Recipe-Nontrivial-Roll: build
> > Recipe-Nontrivial-Roll: release_scripts
> > Reviewed-on: https://chromium-review.googlesource.com/1014356
> > Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
> > Reviewed-by: Aaron Gable <agable@chromium.org>
> 
> Bug: 643346
> Change-Id: I2da17456f24d1e9fcc3f48f9242b4db05cadbf6d
> Reviewed-on: https://chromium-review.googlesource.com/1029073
> Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
> Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

TBR=agable@chromium.org,tandrii@chromium.org,ehmaldonado@chromium.org

Change-Id: I33e4bf7b5f416f6356dbd0b50a276cd36dd4e9b3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 643346
Reviewed-on: https://chromium-review.googlesource.com/1030718Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>