R1:ba6a5dae6156

Make "Facts" publicly viewable

Summary: Ref T4830. Also deletes some very obsolete code.

Test Plan: Looked at Facts as logged out user.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T4830

Differential Revision: https://secure.phabricator.com/D9177