Remove unused template parameter in OnnxifiOp (#19362)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19362
`float` type is never used in OnnxifiOp....
Reviewed By: bddppq
Differential Revision: D14977970
fbshipit-source-id: 8fee02659dbe408e5a3e0ff95d74c04836c5c281
