Remove dead code
Remove dead code

Test Plan: build

Reviewed By: pavlo-fb

Differential Revision: D2963809

fb-gh-sync-id: d0c474261d2290a4f1263946178c8b2bc43a4513
shipit-source-id: d0c474261d2290a4f1263946178c8b2bc43a4513

facebook/mcrouter,yqzhang/mcrouter,synecdoche/mcrouter,synecdoche/mcrouter,synecdoche/mcrouter,yqzhang/mcrouter,synecdoche/mcrouter,yqzhang/mcrouter,yqzhang/mcrouter,facebook/mcrouter,facebook/mcrouter,facebook/mcrouter