Revert D24706475: [pytorch][PR] [NNC] Fix an issue in Cuda fusion with fp16 scalar vars coerced to float
Test Plan: revert-hammer
Differential Revision:
D24706475 (https://github.com/pytorch/pytorch/commit/33cf7fddd2ec198465e680c983244adda69b4f93)
Original commit changeset: 9df72bbbf203
fbshipit-source-id: f16ff04818de4294713d5b97eab5b298c1a75a6b
