Disable default lookup & active generation logging

This logging can be useful for tracking down bugs, but both @wycats and I think this is overwhelming and confusing for new users, and also generates a ton of churn in the logs for larger apps.

Ideally, we can work with @teddyzeenny to allow users to enable and disable this functionality at runtime via the Inspector. In the interim, I think the best default is to leave these commented out so they're discoverable but off by default.