Revert "[ATen] Update pre-compiled header (#106915)"
This reverts commit 4f3284e3edd41b883f8bb347fbe33532b2485f53.
Reverted https://github.com/pytorch/pytorch/pull/106915 on behalf of https://github.com/ZainRizvi due to reverting the full stack. I missed that the iostream pr was stacked under this one and it's builds are also failing internally ([comment](https://github.com/pytorch/pytorch/pull/106915#issuecomment-1689087860))
