Remove Scheduler.log from ReactSuspenseFuzz-test (#28812)

These test don't `assertLog` or `waitFor` so we don't need to
`Scheduler.log`. Ideally we would, but since they're fuzzers it's a bit
difficult to know what the expected log is from the helper.

Since this doesn't regress current test behavior, we can improve them
after this to unblock https://github.com/facebook/react/pull/28737