[Hoisting] Simplify fetching callee cost
[Hoisting] Simplify fetching callee cost

Reviewed By: ezgicicek

Differential Revision: D14970972

fbshipit-source-id: c28597035

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