Make use_future take an impl FnMut + 'static, don't include router prelude when we don't need to

packages/router/examples/simple_routes.rs

@@ -1,5 +1,4 @@
 use dioxus::prelude::*;
-use dioxus::router::prelude::*;
 use std::str::FromStr;
 
 #[cfg(feature = "liveview")]

packages/router/examples/static_generation.rs

@@ -1,7 +1,6 @@
 use std::time::Duration;
 
 use dioxus::prelude::*;
-use dioxus::router::prelude::*;
 
 use dioxus_ssr::incremental::{DefaultRenderer, IncrementalRendererConfig};