Stop generating the [TOC] in the GN reference docs.

Stop generating the [TOC] in the GN reference docs.

As doing so causes Gitiles to crash.

Also, update the docs with the response file change to
'gn refs'.

R=brettw@chromium.org
BUG=468851
, https://code.google.com/p/gitiles/issues/detail?id=75

Committed: https://crrev.com/36a275daed9a044694646530ab58694b487bad4e
Cr-Commit-Position: refs/heads/master@{#326176}

[Dirk Pranke, 2015-04-21 21:20:12]

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

[commit-bot: I haz the power, 2015-04-21 21:20:36]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1097423002/1

[commit-bot: I haz the power, 2015-04-21 22:06:09]

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

[commit-bot: I haz the power, 2015-04-21 22:06:09]

Dry run: This issue passed the CQ dry run.

[brettw, 2015-04-21 23:43:24]

lgtm

[Dirk Pranke, 2015-04-21 23:43:46]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-04-21 23:44:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1097423002/1

[commit-bot: I haz the power, 2015-04-21 23:46:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-21 23:47:34]

Patchset 1 (id:??) landed as
https://crrev.com/36a275daed9a044694646530ab58694b487bad4e
Cr-Commit-Position: refs/heads/master@{#326176}