Don't unconditionally compile runJITCPPTests (#31236)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31236
It is not compiled on Windows
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Differential Revision: D19262581
Pulled By: ezyang
fbshipit-source-id: 80bfa553333a946f00291aaca6ad26313caaa9e6
