Remove static_cast insertion/kernel argument extration. (#17055)
Summary:
In light of the antistatic feature being a part of the released ROCm 2.1, remove
the feature in pyHIPIFY for extraction of kernel arguments and insertion of
static_casts.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17055
Differential Revision: D14068478
Pulled By: bddppq
fbshipit-source-id: 6895f490c78247a129aa18c520ff8d4d1a3d3642
