[sledge] Remove incorrect assertion
[sledge] Remove incorrect assertion

Summary: Remove now-incorrect assertion left over from a previous iteration.

Differential Revision: D31912677

fbshipit-source-id: 1445eb81b

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