Move pre-commit back to upstream flake8
We don't use @overload in this module anymore.
Test Plan
pre-commit run -a
Migrated from D4364 (view on Phabricator)
Staging instance, all changes can be removed at any time
We don't use @overload in this module anymore.
pre-commit run -a
Migrated from D4364 (view on Phabricator)