R1:556c659875c5

Remove unused class

Summary: This class is unused after D6488, maybe we should remove it?

Test Plan: `grep`

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11124