Remove some unusual UI policy hints in Phriction

Summary:
Ref T13077. We currently have these weird policy hints in Phriction that we don't use in other applications. Just remove them for consistency to make the eventual swap to EditEngine a little easier.

Also nuke some unreacahble code.

Test Plan: Loaded edit page, saw more standard UI.

Reviewers: amckinley

Maniphest Tasks: T13077

Differential Revision: https://secure.phabricator.com/D19618