Remove Physical Web upgrade path

Remove Physical Web upgrade path

We previously included an upgrade path for previous version of the
Physical Web that would delete a preference file we no longer use.
At this point, very, very few users should have this preference file,
and actually deleting it is not critical.

BUG=614783
Committed: https://crrev.com/46a931638cc04c48362c4f1761de26975dbae42a
Cr-Commit-Position: refs/heads/master@{#396019}

[cco3, 2016-05-25 19:29:57]

cco3@chromium.org changed reviewers:
+ mattreynolds@chromium.org

[mattreynolds, 2016-05-25 19:31:46]

lgtm

[cco3, 2016-05-25 19:32:57]

cco3@chromium.org changed reviewers:
+ nyquist@chromium.org

[nyquist, 2016-05-25 20:27:28]

lgtm

[cco3, 2016-05-25 21:01:54]

The CQ bit was checked by cco3@chromium.org

[commit-bot: I haz the power, 2016-05-25 21:02:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2006143008/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2006143008/1

[commit-bot: I haz the power, 2016-05-25 22:46:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-25 22:49:43]

Description was changed from

==========
Remove Physical Web upgrade path

We previously included an upgrade path for previous version of the
Physical Web that would delete a preference file we no longer use.
At this point, very, very few users should have this preference file,
and actually deleting it is not critical.

BUG=614783
==========

to

==========
Remove Physical Web upgrade path

We previously included an upgrade path for previous version of the
Physical Web that would delete a preference file we no longer use.
At this point, very, very few users should have this preference file,
and actually deleting it is not critical.

BUG=614783

Committed: https://crrev.com/46a931638cc04c48362c4f1761de26975dbae42a
Cr-Commit-Position: refs/heads/master@{#396019}
==========

[commit-bot: I haz the power, 2016-05-25 22:49:44]

Patchset 1 (id:??) landed as
https://crrev.com/46a931638cc04c48362c4f1761de26975dbae42a
Cr-Commit-Position: refs/heads/master@{#396019}