R1:527391c04fb8

Remove some unused translation strings

Summary: These are no longer required after D11032.

Test Plan: `grep`

Reviewers: btrahan, epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11104