[cleanup] Removed embedded sign-in support code from OOBE.

[cleanup] Removed embedded sign-in support code from OOBE.

We are not going to use 'EmbeddedSignIn' endpoint for OOBE, so this code
could be safely removed.

BUG=468439
TEST=manually

Committed: https://crrev.com/1a56dc72c7345b3ce3ddd71712650e0943cc48a9
Cr-Commit-Position: refs/heads/master@{#321355}

[dzhioev (left Google), 2015-03-18 20:38:27]

dzhioev@chromium.org changed reviewers:
+ rsorokin@chromium.org

[dzhioev (left Google), 2015-03-18 20:38:27]

https://codereview.chromium.org/1018133002/diff/1/chrome/browser/resources/ch...
File chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.js
(left):

https://codereview.chromium.org/1018133002/diff/1/chrome/browser/resources/ch...
chrome/browser/resources/chromeos/login/oobe_screen_oauth_enrollment.js:39:
attemptToken_: null,
This one is unused.

[dzhioev (left Google), 2015-03-18 20:38:50]

Please review.

[Roman Sorokin (ftl), 2015-03-19 09:07:32]

lgtm

[dzhioev_at_google, 2015-03-19 10:03:44]

The CQ bit was checked by dzhioev@google.com

[commit-bot: I haz the power, 2015-03-19 10:04:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1018133002/1

[commit-bot: I haz the power, 2015-03-19 10:04:32]

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

[commit-bot: I haz the power, 2015-03-19 10:04:33]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[dzhioev (left Google), 2015-03-19 11:49:17]

dzhioev@chromium.org changed reviewers:
+ merkulova@chromium.org
- dzhioev@google.com

[dzhioev (left Google), 2015-03-19 11:49:39]

Tania, please review.

[merkulova, 2015-03-19 11:58:30]

lgtm

[dzhioev (left Google), 2015-03-19 14:03:19]

The CQ bit was checked by dzhioev@chromium.org

[commit-bot: I haz the power, 2015-03-19 14:03:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1018133002/1

[commit-bot: I haz the power, 2015-03-19 14:44:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-19 14:45:27]

Patchset 1 (id:??) landed as
https://crrev.com/1a56dc72c7345b3ce3ddd71712650e0943cc48a9
Cr-Commit-Position: refs/heads/master@{#321355}