Remove 3 defines in voice_engine_configurations.h

Remove 3 defines in voice_engine_configurations.h

WEBRTC_VOICE_ENGINE_AGC, WEBRTC_VOICE_ENGINE_ECHO, and
WEBRTC_VOICE_ENGINE_NR are now gone.

BUG=webrtc:6506
Committed: https://crrev.com/097529f34cd029f8e8dcb8d2700feef9c6c5b02b
Cr-Commit-Position: refs/heads/master@{#15309}

[hlundin-webrtc, 2016-11-28 10:36:05]

henrik.lundin@webrtc.org changed reviewers:
+ solenberg@webrtc.org, tina.legrand@webrtc.org

[hlundin-webrtc, 2016-11-28 10:36:05]

solenberg: PTAL
tina: Please, review voice_engine_configurations.h

[the sun, 2016-11-28 12:57:00]

lgtm

[tlegrand-webrtc, 2016-11-30 07:32:23]

lgtm

[hlundin-webrtc, 2016-11-30 07:48:52]

The CQ bit was checked by henrik.lundin@webrtc.org

[commit-bot: I haz the power, 2016-11-30 07:49:00]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2016-11-30 08:12:49]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480492132277650, "parent_rev":
"97ce234e92b3a8ecf118aa03f824a3d49ab0accf", "commit_rev":
"6ec9bff240971f81901248488fb94627b04bbbe2"}

[commit-bot: I haz the power, 2016-11-30 08:12:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-30 08:12:59]

Description was changed from

==========
Remove 3 defines in voice_engine_configurations.h

WEBRTC_VOICE_ENGINE_AGC, WEBRTC_VOICE_ENGINE_ECHO, and
WEBRTC_VOICE_ENGINE_NR are now gone.

BUG=webrtc:6506
==========

to

==========
Remove 3 defines in voice_engine_configurations.h

WEBRTC_VOICE_ENGINE_AGC, WEBRTC_VOICE_ENGINE_ECHO, and
WEBRTC_VOICE_ENGINE_NR are now gone.

BUG=webrtc:6506

Committed: https://crrev.com/097529f34cd029f8e8dcb8d2700feef9c6c5b02b
Cr-Commit-Position: refs/heads/master@{#15309}
==========

[commit-bot: I haz the power, 2016-11-30 08:13:00]

Patchset 1 (id:??) landed as
https://crrev.com/097529f34cd029f8e8dcb8d2700feef9c6c5b02b
Cr-Commit-Position: refs/heads/master@{#15309}