Revert "Fix header inclusions in c10 by iwyu (#100304)"
This reverts commit 6037ee8cc914d64a27965a35b20472044416a2a5.
Reverted https://github.com/pytorch/pytorch/pull/100304 on behalf of https://github.com/jeanschmidt due to Breaking meta internal builds and fbgemm builds ([comment](https://github.com/pytorch/pytorch/pull/100304#issuecomment-1543919257))
