Revert "Re-enable disabled tests under TSan."

Revert "Re-enable disabled tests under TSan."

This reverts commit df9ce12259a4e866feeb580d2e0cf9648f60d3b5.

Reason for revert:

Re-enabled tests still fail tsan in high bitdepth.

Original change's description:
> Re-enable disabled tests under TSan.
>
> These tests point to an already-fixed bug, this should no longer have a
> data race.
>
> BUG=webm:1049
>
> Change-Id: Iaedc5db8df99362bdc501b70ff7fdebf8756fdb8

TBR=jzern@google.com,pbos@chromium.org,builds@webmproject.org

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

Bug: webm:1049
Change-Id: I232f1f7726bf795b301abfb2e07cad6756642e53