Remove an unnecessary lint suppression
Remove an unnecessary lint suppression

Summary: [Thrift] Remove an unnecessary lint suppression in field-ref tests.

Reviewed By: Alfus, zertosh

Differential Revision: D24293547

fbshipit-source-id: ca23ee347b375bf6efd58ff103609fb0dee53308

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift