Remove deprecated large assoc error failover logic
Remove deprecated large assoc error failover logic

Summary: Cleanup large assoc failover logic

Reviewed By: alikhtarov

Differential Revision: D23476177

fbshipit-source-id: 36f8b30268372f5ecfdcbf60da2bab6c5d247a65

facebook/mcrouter,facebook/mcrouter,facebook/mcrouter,facebook/mcrouter