[urgent] Xamarin.Forms v3.0.0 not compatible with EventGenerator

[ghuntley]

Do you want to request a feature or report a bug?

bug

What is the current behavior?

💥 during compilation

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem

Remove #1624 and watch 💥

What is the expected behavior?

🎉

What is the motivation / use case for changing the behavior?

Fixing this allows us to bump to v3 of xamarin forms in the near future and unblocks #1577

Which versions of ReactiveUI, and which platform / OS are affected by this issue? Did this work in previous versions of ReativeUI? Please also test with the latest stable and development snapshot

v8.0.0

Other information (e.g. stacktraces, related issues, suggestions how to fix)

[cabauman]

Looks like this was resolved in #1631.