refactor: Remove unused legacy ex.Configurable

CHANGELOG.md

@@ -7,6 +7,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Breaking Changes
 
+- Removed legacy `ex.Configurable` function type used for doing dark magic to allow types to be configured by instances of that same type :boom:
 - Collision events now only target `ex.Collider` types, this previously would sometimes emit an `ex.Entity` if you attached to the `ex.ColliderComponent`
   * `ex.PreCollisionEvent`
   * `ex.PostCollisionEvent`

src/engine/index.ts

@@ -16,7 +16,6 @@ export * from './Screen';
 export * from './Actor';
 export * from './Math/Index';
 export * from './Camera';
-export * from './Configurable';
 export * from './Debug/index';
 export * from './EventDispatcher';
 export * from './EventEmitter';