Removed unnecessary preference group

Removed Managed group from showing when the permission is turned off
in an OS level, as otherwise it causes an arrow icon to show.
The arrow icon is used for collapsing entries in a group,
and since the group should not be shown, the arrow should not be shown
either.
Screenshot: https://imgur.com/a/IgDlEzE
Bug: 956459

Change-Id: I184ea525f666913a5ecd4b124e8d6539b7f48141
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1611984
Reviewed-by: Finnur Thorarinsson <finnur@chromium.org>
Commit-Queue: Kamila Hasanbega <hkamila@google.com>
Cr-Commit-Position: refs/heads/master@{#659901}
1 file changed