[FSDP] Remove unneeded disable of tf32 (#100179)
I recall needing to disable tf32, but I cannot repro the issue anymore. Nowhere else in our unit tests do we disable tf32, so we can try to get rid of this disabling.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/100179
Approved by: https://github.com/rohan-varma
