Revert of Try TSAN blacklist for SkGLContextHelper::init. (https://codereview.chromium.org/309823004/)

Reason for revert:
the bot's clang doesn't know -fsanitize-blacklist

Original issue's description:
> Try TSAN blacklist for SkGLContextHelper::init.
>
> Submitting to test this; this particular problem only happens on the bot.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/ab2ec19b975a898d4ee2278ddad7d4268f134478

R=mtklein@chromium.org
TBR=mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/314543002
3 files changed