Blank UDL for the sake of agility #180

[KendallWeihe]

Proposal to temporarily blank out the UDL for the sake of near term agility. Closes #180; copy/pasting here:

We're carrying around a lot of baggage with the current UDL file; we're in a state of actively changing the API surface in order to nail down the optimal route forward. In doing so, every time we make a breaking API change we have to update bindings, which makes PRs a nuisance to review. I propose we blank the current UDL file, so that we can move faster. We have confidence that UniFFI bindings will work, and we can reference back to the existing commit when we go to build out bindings FOR REAL.

Also I'll add that some of these UDL patterns may be subject to change; I want to bring in more team members from the ground-up to explore the different patterns and ways forward.