yoda: cargo fix --lib across all crates — drop ~115 trivial warnings

Auto-applied suggestions (unused imports, _-prefixed unused params,
redundant mutability) on iced_core, iced_widget, iced_runtime, iced_winit,
iced_wgpu, iced_graphics, iced_tiny_skia. From 170 warnings down to 55.

Leyoda 2026 – GPLv3

wgpu/src/layer.rs

@@ -1,4 +1,3 @@
-use crate::core::Radians;
 use crate::core::{
     self, Background, Color, Point, Rectangle, Svg, Transformation, renderer,
 };

wgpu/src/lib.rs

@@ -64,8 +64,8 @@ pub use geometry::Geometry;
 
 use crate::core::renderer;
 use crate::core::{
-    Background, Color, Font, Pixels, Point, Radians, Rectangle, Size,
-    Transformation, Vector, image::FilterMethod,
+    Background, Color, Font, Pixels, Point, Rectangle, Size,
+    Transformation, Vector,
 };
 use crate::graphics::mesh;
 use crate::graphics::text::{Editor, Paragraph};

wgpu/src/window/compositor.rs

@@ -18,7 +18,6 @@ use crate::{Engine, Renderer};
 use super::wayland::get_wayland_device_ids;
 #[cfg(all(unix, feature = "x11", not(target_os = "macos"), not(target_os = "redox")))]
 use super::x11::get_x11_device_ids;
-use std::future::Future;
 
 /// A window graphics backend for iced powered by `wgpu`.
 pub struct Compositor {