## Summary Switch to the official version of [`mypy_primer`](https://github.com/hauntsaninja/mypy_primer), now that Red Knot support has been upstreamed (see https://github.com/hauntsaninja/mypy_primer/pull/138, https://github.com/hauntsaninja/mypy_primer/pull/135, https://github.com/hauntsaninja/mypy_primer/pull/151, https://github.com/hauntsaninja/mypy_primer/pull/155). ## Test Plan Locally and in CI