dillon1000/react

Unify promise switch statements

There are two different switch statements that we use to unwrap a
`use`-ed promise, but there really only needs to be one. This was a
factoring artifact that arose because I implemented the yieldy `status`
instrumentation thing before I implemented `use` (for promises that are
thrown directly during render, which is the old Suspense pattern that
will be superseded by `use`).