[purity] Remove duplicated/unnecessary code
[purity] Remove duplicated/unnecessary code

Summary: clowntown

Reviewed By: skcho

Differential Revision: D19881696

fbshipit-source-id: a01acf7b4

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