Revert of DM: run pdf config on the bots. (patchset #1 id:1 of https://codereview...

Revert of DM: run pdf config on the bots. (patchset #1 id:1 of https://codereview.chromium.org/968953002/)

Reason for revert:
Will try this again after investigating OOMs on Xoom, N5 (i.e. the bots that actually run non-GPU work like PDF).

Original issue's description:
> DM: run pdf config on the bots.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/b12f88152c87e006d04fade4f106669cd9e44677

TBR=stephana@google.com,halcanary@google.com,mtklein@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/959123003