Remove Flow type definitions

Closes #2097.

Author: novemberborn

docs/recipes/flow.md

@@ -2,7 +2,9 @@
 
 Translations: [Français](https://github.com/avajs/ava-docs/blob/master/fr_FR/docs/recipes/flow.md)
 
-AVA comes bundled with a Flow definition file. This allows developers to leverage Flow for writing tests.
+Until [1.4.1](https://github.com/avajs/ava/releases/tag/v1.4.1) AVA came bundled with a Flow definition file. This allows developers to leverage Flow for writing tests.
+
+**We need some help publishing the type definitions outside of AVA. Please join us in https://github.com/avajs/flow-typed/issues/1 if you'd like to help out.**
 
 This guide assumes you've already set up Flow for your project. Note that AVA's definition as been tested with version 0.95.1.