Revert "Support both train / eval modes for ModuleInfo"
This reverts commit 12658fcd5bdf4d2437754633b3fa39ab15d213b9.
Reverted https://github.com/pytorch/pytorch/pull/78735 on behalf of https://github.com/malfet due to Broke eval tests on Win, 10.2 and ROCM, see https://hud.pytorch.org/pytorch/pytorch/commit/12658fcd5bdf4d2437754633b3fa39ab15d213b9
