Remove builtin/runtime name clash presubmit check.

Remove builtin/runtime name clash presubmit check.

It has become obsolete since we do the name lookup at compile time.

R=bmeurer@chromium.org

Committed: https://crrev.com/6bef1d0a134995d3136f83d6165a7007119a02c3
Cr-Commit-Position: refs/heads/master@{#30405}

[Yang, 2015-08-27 10:33:10]

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

[Benedikt Meurer, 2015-08-27 10:33:18]

LGTM!

[commit-bot: I haz the power, 2015-08-27 10:33:19]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1319893004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1319893004/1

[commit-bot: I haz the power, 2015-08-27 10:59:21]

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

[commit-bot: I haz the power, 2015-08-27 10:59:21]

Dry run: This issue passed the CQ dry run.

[Yang, 2015-08-27 11:12:15]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-08-27 11:12:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1319893004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1319893004/1

[commit-bot: I haz the power, 2015-08-27 11:14:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-27 11:14:15]

Patchset 1 (id:??) landed as
https://crrev.com/6bef1d0a134995d3136f83d6165a7007119a02c3
Cr-Commit-Position: refs/heads/master@{#30405}