Remove shawnsingh@ from ui/gfx/OWNERS

Remove shawnsingh@ from ui/gfx/OWNERS

He's no longer working on the project so shouldn't be asked for reviews.

Committed: https://crrev.com/f59f9ae248be272748980f069a081b6e9e26755f
Cr-Commit-Position: refs/heads/master@{#299993}

[danakj, 2014-10-15 22:10:27]

danakj@chromium.org changed reviewers:
+ sky@chromium.org
- enne@chromium.org

[sky, 2014-10-16 19:34:18]

LGTM

[danakj, 2014-10-16 21:08:59]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-10-16 21:10:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/662513002/1

[commit-bot: I haz the power, 2014-10-16 22:23:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-16 22:24:00]

Patchset 1 (id:??) landed as
https://crrev.com/f59f9ae248be272748980f069a081b6e9e26755f
Cr-Commit-Position: refs/heads/master@{#299993}