[cc_cleanup] remove trigger_idle_updates_ variable

[cc_cleanup] remove trigger_idle_updates_ variable

This is used earlier in CompositeAndReadback.
Its not used any where now, so removing this.

BUG=

Committed: https://crrev.com/2a7f07601f6e72e466be894e9f7842c11fa44f98
Cr-Commit-Position: refs/heads/master@{#296790}

[sivag, 2014-09-25 19:19:15]

siva.gunturi@samsung.com changed reviewers:
+ danakj@chromium.org

[sivag, 2014-09-25 19:19:15]

ptal..

[danakj, 2014-09-25 19:20:17]

LGTM

[danakj, 2014-09-25 19:20:49]

The subject should be the first line of the description too so it appears as the
patch title in git.

[danakj, 2014-09-25 19:20:58]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-09-25 19:23:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/604903003/1

[sivag, 2014-09-25 19:24:53]

On 2014/09/25 19:20:49, danakj wrote:
> The subject should be the first line of the description too so it appears as
the
> patch title in git.

OK, thanks will take care from next time.

[commit-bot: I haz the power, 2014-09-25 20:56:08]

Committed patchset #1 (id:1) as 84ab3d9e0dd29fca6d53021c287a93e118a248e6

[commit-bot: I haz the power, 2014-09-25 20:56:42]

Patchset 1 (id:??) landed as
https://crrev.com/2a7f07601f6e72e466be894e9f7842c11fa44f98
Cr-Commit-Position: refs/heads/master@{#296790}