Remove deprecated cursor event filter for Ozone

Remove deprecated cursor event filter for Ozone

Removes the old filter in favor of the new one which is enabled
by default on non-Ozone CrOS builds.

BUG=none
TESTS=ran ash_unittests --gtest_filter=MouseCursorEventFilterTest.* on an Ozone build and manually tested on link_freon

Committed: https://crrev.com/cee48a5ba8c24eb8b8ea7f789e3025ac79549a4d
Cr-Commit-Position: refs/heads/master@{#295169}

[dnicoara, 2014-09-16 21:22:18]

dnicoara@chromium.org changed reviewers:
+ oshima@chromium.org

[dnicoara, 2014-09-16 21:22:19]

PTAL

[oshima, 2014-09-16 21:40:09]

lgtm++

[dnicoara, 2014-09-16 22:00:49]

The CQ bit was checked by dnicoara@chromium.org

[commit-bot: I haz the power, 2014-09-16 22:02:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/580553002/20001

[commit-bot: I haz the power, 2014-09-16 22:57:52]

Committed patchset #2 (id:20001) as 9f997f41ad01c30b6b637a6dffb650d89af88074

[commit-bot: I haz the power, 2014-09-16 22:59:06]

Patchset 2 (id:??) landed as
https://crrev.com/cee48a5ba8c24eb8b8ea7f789e3025ac79549a4d
Cr-Commit-Position: refs/heads/master@{#295169}

[acolwell GONE FROM CHROMIUM, 2014-09-16 23:46:27]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/567413003/ by acolwell@chromium.org.

The reason for reverting is: This appears to be causing
ImmersiveFullscreenControllerTest.MouseEventsVerticalDisplayLayout to fail on
Chromium OS Ozone bots.
http://build.chromium.org/p/chromium.chromiumos/buildstatus?builder=Linux%20C...
http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%2....