Revert "[Reland] Update mypy to 1.4.1 (#105227)"
This reverts commit c9c4f8efc3dd4e66059522bf5f5c1ba0431e2069.
Reverted https://github.com/pytorch/pytorch/pull/105227 on behalf of https://github.com/atalman due to trying to mitigate ci sev #105248 ([comment](https://github.com/pytorch/pytorch/pull/105227#issuecomment-1636510935))
