Remove CSS.unregisterProperty as the WG resolved to remove it for now

Remove CSS.unregisterProperty as the WG resolved to remove it for now

At the TPAC F2F last month, the WG resolved to remove property
deregistration (although it's likely to be re-added later).
This patch removes the unregisterProperty function for now.

The spec has not yet been update to remove the function.

https://logs.csswg.org/irc.w3.org/houdini/2016-09-22/#e727846

BUG=641877
Committed: https://crrev.com/6f4d446b10b026ed240137444c95935baf99ca05
Cr-Commit-Position: refs/heads/master@{#424676}

[Timothy Loh, 2016-10-11 06:22:22]

The CQ bit was checked by timloh@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-11 06:22:36]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Timothy Loh, 2016-10-11 06:22:58]

timloh@chromium.org changed reviewers:
+ meade@chromium.org

[commit-bot: I haz the power, 2016-10-11 07:40:54]

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

[commit-bot: I haz the power, 2016-10-11 07:40:56]

Dry run: This issue passed the CQ dry run.

[meade_UTC10, 2016-10-12 04:29:03]

lgtm

[Timothy Loh, 2016-10-12 05:22:26]

The CQ bit was checked by timloh@chromium.org

[commit-bot: I haz the power, 2016-10-12 05:22:38]

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

[commit-bot: I haz the power, 2016-10-12 05:27:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-12 05:29:28]

Description was changed from

==========
Remove CSS.unregisterProperty as the WG resolved to remove it for now

At the TPAC F2F last month, the WG resolved to remove property
deregistration (although it's likely to be re-added later).
This patch removes the unregisterProperty function for now.

The spec has not yet been update to remove the function.

https://logs.csswg.org/irc.w3.org/houdini/2016-09-22/#e727846

BUG=641877
==========

to

==========
Remove CSS.unregisterProperty as the WG resolved to remove it for now

At the TPAC F2F last month, the WG resolved to remove property
deregistration (although it's likely to be re-added later).
This patch removes the unregisterProperty function for now.

The spec has not yet been update to remove the function.

https://logs.csswg.org/irc.w3.org/houdini/2016-09-22/#e727846

BUG=641877

Committed: https://crrev.com/6f4d446b10b026ed240137444c95935baf99ca05
Cr-Commit-Position: refs/heads/master@{#424676}
==========

[commit-bot: I haz the power, 2016-10-12 05:29:29]

Patchset 1 (id:??) landed as
https://crrev.com/6f4d446b10b026ed240137444c95935baf99ca05
Cr-Commit-Position: refs/heads/master@{#424676}