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This reverts commit 0d7be96e.

Reason for revert: Suspected of causing failures on CrOS device bots, see https://crbug.com/1143224

Original change's description:
> Add --use-swarming-go to the custom trigger scripts
>
> Design doc: http://go/roll-go-swarming-to-trigger-scripts
>
> Bug: 1127205
> Change-Id: I8ca8e2bb381f340fc23b91339cdb56374f8eead8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2500976
> Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
> Reviewed-by: Wenbin Zhang <wenbinzhang@google.com>
> Commit-Queue: Ye Kuang <yekuang@google.com>
> Cr-Commit-Position: refs/heads/master@{#821619}

TBR=tikuta@chromium.org,wenbinzhang@google.com,yekuang@google.com

Change-Id: I017fc7ef2947a7d0f2e077e6d8eafd98b7f2865f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1127205
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2505509Reviewed-by: Dominik Röttsches <drott@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821687}