Removed bogus threading test to make TSAN happy.

Removed bogus threading test to make TSAN happy.

TSAN hits an internal assertion on a self-join, and the test is not
really that useful, so let's just remove it.

BUG=https://code.google.com/p/thread-sanitizer/issues/detail?id=88
LOG=n

Committed: https://crrev.com/8fb593047a83a3ced9802ad41ff4529e2dc31d1f
Cr-Commit-Position: refs/heads/master@{#26217}

[Sven Panne, 2015-01-22 07:50:11]

svenpanne@chromium.org changed reviewers:
+ bmeurer@chromium.org

[Benedikt Meurer, 2015-01-22 09:49:54]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2015-01-22 09:49:55]

lgtm

[commit-bot: I haz the power, 2015-01-22 09:50:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/824243007/1

[Michael Achenbach, 2015-01-22 10:08:51]

machenbach@chromium.org changed reviewers:
+ machenbach@chromium.org

[Michael Achenbach, 2015-01-22 10:08:51]

lgtm

[commit-bot: I haz the power, 2015-01-22 10:23:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-22 10:24:09]

Patchset 1 (id:??) landed as
https://crrev.com/8fb593047a83a3ced9802ad41ff4529e2dc31d1f
Cr-Commit-Position: refs/heads/master@{#26217}