Cleanup: Delete SkFlattenableBuffers header.

Cleanup: Delete SkFlattenableBuffers header.

It is empty. cs.chromium.org shows no one is including it.

BUG=skia:3108
R=reed@google.com

Committed: https://skia.googlesource.com/skia/+/8816e7bfbe38e0ae9bf2d9879298c1965c2ff171

[tfarina, 2014-11-13 02:22:27]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-11-13 02:23:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/722943002/1

[commit-bot: I haz the power, 2014-11-13 02:23:16]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2014-11-13 08:23 UTC

[commit-bot: I haz the power, 2014-11-13 02:23:18]

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

[commit-bot: I haz the power, 2014-11-13 02:23:19]

Presubmit check for 722943002-1 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit ERRORS **
Since the CL is editing public API, you must have an LGTM from one of:
('reed@chromium.org', 'reed@google.com', 'bsalomon@chromium.org',
'bsalomon@google.com', 'djsollen@chromium.org', 'djsollen@google.com')

[hal.canary, 2014-11-13 02:29:53]

halcanary@google.com changed reviewers:
+ halcanary@google.com

[hal.canary, 2014-11-13 02:29:54]

lgtm

I was waiting for http://crrev.com/478383002 to land, and then I was distracted
by other things, and then I went on leave.

LGTM

[tfarina, 2014-11-13 14:48:21]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-11-13 14:49:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/722943002/1

[commit-bot: I haz the power, 2014-11-13 14:49:09]

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

[commit-bot: I haz the power, 2014-11-13 14:49:10]

Presubmit check for 722943002-1 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit ERRORS **
Since the CL is editing public API, you must have an LGTM from one of:
('reed@chromium.org', 'reed@google.com', 'bsalomon@chromium.org',
'bsalomon@google.com', 'djsollen@chromium.org', 'djsollen@google.com')

[reed1, 2014-11-13 18:34:54]

The CQ bit was checked by reed@google.com

[reed1, 2014-11-13 18:34:58]

lgtm

[commit-bot: I haz the power, 2014-11-13 18:35:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/722943002/1

[commit-bot: I haz the power, 2014-11-13 18:51:25]

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

[commit-bot: I haz the power, 2014-11-13 18:51:26]

Try jobs failed on following builders:
  Test-Ubuntu13.10-GCE-NoGPU-x86_64-Debug-Trybot on client.skia
(http://build.chromium.org/p/client.skia/builders/Test-Ubuntu13.10-GCE-NoGPU-x...)

[tfarina, 2014-11-13 22:41:56]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-11-13 22:42:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/722943002/1

[commit-bot: I haz the power, 2014-11-13 22:50:05]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/8816e7bfbe38e0ae9bf2d9879298c1965c2ff171