[build] Remove deleted function from FbThreadSafety mli
[build] Remove deleted function from FbThreadSafety mli

Reviewed By: jeremydubreil

Differential Revision: D4768952

fbshipit-source-id: 81225a7

facebook/infer,blzq/infer,blzq/infer,ryoon/infer,facebook/infer,ryoon/infer,blzq/infer,jvillard/infer,ropas/infer,jvillard/infer,ropas/infer,facebook/infer,jvillard/infer,facebook/infer,blzq/infer,blzq/infer,ryoon/infer,ropas/infer,jvillard/infer,ropas/infer,ryoon/infer,jsachs/infer,ryoon/infer,jsachs/infer,blzq/infer,ropas/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,jvillard/infer,ryoon/infer,ropas/infer,jsachs/infer,jsachs/infer,jsachs/infer,jsachs/infer,facebook/infer