[Telemetry] Remove Page.TransferToPageSet method.

[Telemetry] Remove Page.TransferToPageSet method.

This method is never used. It was introduced as a way to conveniently share pages among page sets. The implementation
is not correct as archive_data_file is defined in page_set.

In the future, sharing pages among pageset should be simple
when we can remove the page's dependence on pageset (https://code.google.com/p/chromium/issues/detail?id=466836)

Committed: https://crrev.com/654481e2ebabb556baf92e5003c7a32d84a8b05b
Cr-Commit-Position: refs/heads/master@{#322661}

[nednguyen, 2015-03-26 00:44:39]

nednguyen@google.com changed reviewers:
+ aiolos@chromium.org, dtu@chromium.org

[nednguyen, 2015-03-27 20:50:04]

ping

[aiolos (Not reviewing), 2015-03-27 21:35:07]

lgtm.

[nednguyen, 2015-03-27 21:41:39]

The CQ bit was checked by nednguyen@google.com

[commit-bot: I haz the power, 2015-03-27 21:42:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1033493003/1

[commit-bot: I haz the power, 2015-03-27 22:37:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-27 22:38:34]

Patchset 1 (id:??) landed as
https://crrev.com/654481e2ebabb556baf92e5003c7a32d84a8b05b
Cr-Commit-Position: refs/heads/master@{#322661}