This reverts commit c4575f80.

Reason for revert: git.exe is not present everywhere. We should check for git.bat

Original change's description:
> [dirmd] Roll dirmd
>
> To pickup
> - https://chromium-review.googlesource.com/c/infra/infra/+/2889534
> - https://chromium-review.googlesource.com/c/infra/infra/+/2889536
> - https://chromium-review.googlesource.com/c/infra/infra/+/2893228
> - https://chromium-review.googlesource.com/c/infra/infra/+/2893224
>
> Bug: 1201822
> Change-Id: I000db40b88d3c2e2b2047a993ed3983a2f09519e
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2891365
> Auto-Submit: Nodir Turakulov <nodir@chromium.org>
> Commit-Queue: Dirk Pranke <dpranke@google.com>
> Reviewed-by: Dirk Pranke <dpranke@google.com>

Bug: 1201822
Change-Id: I21c21b6be6f816485a849980fe7ae60b85c436fc
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2892386
Auto-Submit: Nodir Turakulov <nodir@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>