Remove references to an old gyp variable that's no longer supported.

Remove references to an old gyp variable that's no longer supported.

BUG=463660
Committed: https://crrev.com/a1e4c970af90488466a54f29529b2741a433c104
Cr-Commit-Position: refs/heads/master@{#345562}

[tommi (sloooow) - chröme, 2015-08-25 19:16:10]

tommi@chromium.org changed reviewers:
+ thakis@chromium.org

[tommi (sloooow) - chröme, 2015-08-25 19:16:22]

The CQ bit was checked by tommi@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-08-25 19:17:10]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1318583002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1318583002/1

[Nico, 2015-08-25 19:37:03]

rs-lgtm

[tommi (sloooow) - chröme, 2015-08-25 19:42:10]

On 2015/08/25 19:37:03, Nico wrote:
> rs-lgtm

Thanks. The code behind this feature was removed a while ago so I'm pretty
confident this won't break anything.

[commit-bot: I haz the power, 2015-08-25 20:55:39]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-25 20:55:40]

Dry run: This issue passed the CQ dry run.

[tommi (sloooow) - chröme, 2015-08-26 08:33:15]

The CQ bit was checked by tommi@chromium.org

[commit-bot: I haz the power, 2015-08-26 08:33:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1318583002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1318583002/1

[commit-bot: I haz the power, 2015-08-26 08:45:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-26 08:46:25]

Patchset 1 (id:??) landed as
https://crrev.com/a1e4c970af90488466a54f29529b2741a433c104
Cr-Commit-Position: refs/heads/master@{#345562}