arc-bridge: Remove unused PowerObserver

arc-bridge: Remove unused PowerObserver

This should have not been committed in r366657, but it was not removed
during the rebase.

BUG=None
TEST=ninja

Committed: https://crrev.com/cc0e0a599384ee83e0e3e7e30131b4916dcdf62a
Cr-Commit-Position: refs/heads/master@{#367078}

[Luis Héctor Chávez, 2015-12-28 17:27:21]

lhchavez@chromium.org changed reviewers:
+ hidehiko@chromium.org

[Luis Héctor Chávez, 2015-12-28 17:27:21]

PTAL

[hidehiko, 2015-12-29 13:30:13]

LGTM.

Could you CC to someone who's actually working on power management stuff before
submitting?

[Luis Héctor Chávez, 2015-12-29 17:19:56]

lhchavez@chromium.org changed reviewers:
+ ejcaruso@chromium.org

[Luis Héctor Chávez, 2015-12-29 17:19:57]

ejcaruso@ FYI

[Luis Héctor Chávez, 2015-12-29 17:20:07]

The CQ bit was checked by lhchavez@chromium.org

[commit-bot: I haz the power, 2015-12-29 17:20:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1546343002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1546343002/1

[commit-bot: I haz the power, 2015-12-29 17:24:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-12-29 17:25:15]

Description was changed from

==========
arc-bridge: Remove unused PowerObserver

This should have not been committed in r366657, but it was not removed
during the rebase.

BUG=None
TEST=ninja
==========

to

==========
arc-bridge: Remove unused PowerObserver

This should have not been committed in r366657, but it was not removed
during the rebase.

BUG=None
TEST=ninja

Committed: https://crrev.com/cc0e0a599384ee83e0e3e7e30131b4916dcdf62a
Cr-Commit-Position: refs/heads/master@{#367078}
==========

[commit-bot: I haz the power, 2015-12-29 17:25:16]

Patchset 1 (id:??) landed as
https://crrev.com/cc0e0a599384ee83e0e3e7e30131b4916dcdf62a
Cr-Commit-Position: refs/heads/master@{#367078}