Revert "[windows services] Increase the timeout for unittests"

This reverts commit 371043f048115b3d1ecc2d4c732f397acb6ff251.

Reason for revert: didn't address the problem. https://crrev.com/c/6037924 is a better approach.

Original change's description:
> [windows services] Increase the timeout for unittests
>
> The test ServiceTest.Rapid reuse may fail with a timeout after 120s. It
> emits diagnostics that may help diagnose the underlying cause when it
> does so, so give it 125s before killing it.
>
> Bug: 375097840
> Change-Id: Ic20893f481fdc4525163b562f7b5cadeca07f0f8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6035515
> Reviewed-by: Gregory Guterman <guterman@google.com>
> Commit-Queue: Greg Thompson <grt@chromium.org>
> Auto-Submit: Greg Thompson <grt@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1386101}

Bug: 375097840
Change-Id: I39585697767f0eb10f8c7728e4e633a9fa79f985
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6039898
Commit-Queue: Gregory Guterman <guterman@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Greg Thompson <grt@chromium.org>
Reviewed-by: Gregory Guterman <guterman@google.com>
Cr-Commit-Position: refs/heads/main@{#1386324}