Remove hashimoto@chromium.org from file_manager/webstore_widget_private OWNERS

Remove hashimoto@chromium.org from file_manager/webstore_widget_private OWNERS

For these directories, much better reviewers are available.

BUG=None

Committed: https://crrev.com/ab65d04a0057d0d8d7bd4557357e4b99d735dce5
Cr-Commit-Position: refs/heads/master@{#330904}

[hashimoto, 2015-05-20 07:13:47]

hashimoto@chromium.org changed reviewers:
+ mtomasz@chromium.org

[mtomasz, 2015-05-20 07:15:09]

lgtm

[hashimoto, 2015-05-21 05:41:05]

The CQ bit was checked by hashimoto@chromium.org

[hashimoto, 2015-05-21 05:41:05]

The patchset sent to the CQ was uploaded after l-g-t-m from mtomasz@chromium.org
Link to the patchset: https://codereview.chromium.org/1142383004/#ps20001
(title: "rebase")

[commit-bot: I haz the power, 2015-05-21 05:41:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1142383004/20001

[commit-bot: I haz the power, 2015-05-21 05:49:04]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-05-21 05:49:51]

Patchset 2 (id:??) landed as
https://crrev.com/ab65d04a0057d0d8d7bd4557357e4b99d735dce5
Cr-Commit-Position: refs/heads/master@{#330904}