message: remove useless cast
diff: @@ -27,7 +27,7 @@ export class GenEffect<R, E, A> {
  constructor(readonly effect: Effect<R, E, A> | Managed<R, E, A>) {}
  *[Symbol.iterator](): Generator<GenEffect<R, E, A>, A, any> {
  - return (yield this) as any
  + return yield this
  }
  }
  