Revert "Add debug chromium bots"

This reverts commit 2db4180229db1c343018f96400d97944534b7a77.

Reason for revert: Bots are purple, will reland and make sure they're green later.

Original change's description:
> Add debug chromium bots
> 
> These are mirrors of the existing release bots
> 
> Bug: 867725
> Change-Id: I6f59d04a82103572e801273e294534e822d3e03d
> Reviewed-on: https://chromium-review.googlesource.com/1159172
> Commit-Queue: Stephen Martinis <martiniss@chromium.org>
> Reviewed-by: Nodir Turakulov <nodir@chromium.org>
> Reviewed-by: Dirk Pranke <dpranke@chromium.org>
> Reviewed-by: Kenneth Russell <kbr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#582390}

TBR=iannucci@chromium.org,vadimsh@chromium.org,dpranke@chromium.org,kbr@chromium.org,nodir@chromium.org,martiniss@chromium.org,jbudorick@chromium.org

Change-Id: I28a27093f09db79c83239070325254df6a1a0dca
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 867725
Reviewed-on: https://chromium-review.googlesource.com/1171430
Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Commit-Queue: Stephen Martinis <martiniss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582406}
7 files changed