Remove unused function
Remove unused function

Summary:
A continuation of D26916795 (https://github.com/facebook/flow/commit/c7a273561a854c86b5910ecbe4c843b86b3ad702). This was left over from some openness work by
dsainati1.

Reviewed By: dsainati1

Differential Revision: D27027374

fbshipit-source-id: 255d1a9c300d8598bfec41ca0e5cbef4248509e5

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow