[topl] Remove unused type
[topl] Remove unused type

Summary: Seems like it was unused. Not sure why we didn't detect this before.

Reviewed By: jvillard

Differential Revision: D39927201

fbshipit-source-id: 59ba115ce32d4a43d0c8f0af251b2102cfa64af5

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