[sledge] Refactor: Remove unused functor arg name
[sledge] Refactor: Remove unused functor arg name

Reviewed By: jvillard

Differential Revision: D21923487

fbshipit-source-id: b504c060f

facebook/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer