Revert of Created an empty expectations file to ignore flaky tests (patchset #9 id...

Revert of Created an empty expectations file to ignore flaky tests (patchset #9 id:160001 of https://codereview.chromium.org/376653002/)

Reason for revert:
Ignorer-bot project has been delayed to determine whether it is necessary at all. This doesn't have to be in the repo.

Original issue's description:
> Created an empty expectations file to ignore flaky tests
>
> This is used by https://codereview.chromium.org/373223003/
>
> BUG=390600
> R=eseidel@chromium.org, stip@chromium.org, hinoka@chromium.org
>
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284062

TBR=ojan@chromium.org,eseidel@chromium.org,hinoka@chromium.org,sergeyberezin@chromium.org,stip@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=390600

Review URL: https://codereview.chromium.org/549103003

Cr-Commit-Position: refs/heads/master@{#293750}