Revert "Prevent de-duplication of Housekeeper-PerCommit-BuildTaskDrivers"

This reverts commit 81158535ed1ba414458e2b8b7980b7d5a8f55bb8.

Reason for revert: Hopefully not needed after https://skia-review.googlesource.com/c/skia/+/262217

Original change's description:
> Prevent de-duplication of Housekeeper-PerCommit-BuildTaskDrivers
> 
> Without this the task was getting deduped with tasks that ran days ago.
> Eg: https://chromium-swarm.appspot.com/task?d=true&id=496142b461f15f10
> 
> Bug: skia:9514
> Change-Id: I1c93e3f298ef5d6be222578618759b5fb63ca8c1
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/261555
> Reviewed-by: Ravi Mistry <rmistry@google.com>
> Commit-Queue: Ravi Mistry <rmistry@google.com>

TBR=borenet@google.com,rmistry@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: skia:9514
Change-Id: I90d2d5b52394b791dc744e12c149b31c64af3027
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263198
Reviewed-by: Ravi Mistry <rmistry@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
2 files changed