Revert "CFX custom Device Settings implementation"

Summary: This reverts commit 186d9a2948ba661c974da5aaf64aa6d39b88975e.

Test Plan: depends on D490

Reviewers: synergy, anders3408, jriordan001, raymanfx, donald.munn, rlasalle15

Differential Revision: http://review.codefirex.com/D491