Remove unused suppression.

Remove unused suppression.

This was fixed in https://codereview.chromium.org/26784003 which removed the
problematic InformDelegateDownloadDataIfNecessary method.

BUG=296883
Committed: https://crrev.com/2cad80e32ba9f877bb2d304e4ba9e0a4444ef722
Cr-Commit-Position: refs/heads/master@{#332935}

[davidben, 2015-06-04 21:42:55]

davidben@chromium.org changed reviewers:
+ mmenke@chromium.org

[mmenke, 2015-06-04 21:46:29]

LGTM.

[davidben, 2015-06-04 21:48:01]

The CQ bit was checked by davidben@chromium.org

[commit-bot: I haz the power, 2015-06-04 21:48:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169453006/1

[commit-bot: I haz the power, 2015-06-04 22:01:02]

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

[commit-bot: I haz the power, 2015-06-04 22:01:03]

Try jobs failed on following builders:
  android_chromium_gn_compile_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)

[davidben, 2015-06-04 22:12:12]

The CQ bit was checked by davidben@chromium.org

[commit-bot: I haz the power, 2015-06-04 22:15:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169453006/1

[commit-bot: I haz the power, 2015-06-04 22:26:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-04 22:28:49]

Patchset 1 (id:??) landed as
https://crrev.com/2cad80e32ba9f877bb2d304e4ba9e0a4444ef722
Cr-Commit-Position: refs/heads/master@{#332935}