Cleanup: Remove aura_builder target.

Cleanup: Remove aura_builder target.

Now that Aura is the default for a long time on Linux, this does not
seem to be necessary anymore.

BUG=None
TEST=trybots
R=thakis@chromium.org

Committed: https://crrev.com/c1dcb9c1ba668d4948441d956709ab9747b5c65d
Cr-Commit-Position: refs/heads/master@{#315765}

[Nico, 2015-02-11 03:43:47]

has to be removed from
https://code.google.com/p/chromium/codesearch#chromium/build/scripts/slave/re...
first, else those bots will go red

[tfarina, 2015-02-11 10:20:48]

On 2015/02/11 at 03:43:47, thakis wrote:
> has to be removed from
https://code.google.com/p/chromium/codesearch#chromium/build/scripts/slave/re...
first, else those bots will go red

Even if we have another aura_builder target declared at
https://chromium.googlesource.com/chromium/src/+/master/build/all.gyp#1256? Bots
are green because of it.

PTAL.

[Nico, 2015-02-11 14:52:38]

lgtm

[tfarina, 2015-02-11 15:15:43]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-02-11 15:16:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/916713002/1

[commit-bot: I haz the power, 2015-02-11 15:42:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-11 15:43:03]

Patchset 1 (id:??) landed as
https://crrev.com/c1dcb9c1ba668d4948441d956709ab9747b5c65d
Cr-Commit-Position: refs/heads/master@{#315765}