Replace cargo machete with cargo shear (#8094)

We've had good experiences with `cargo shear` at Rerun

crates/egui-winit/Cargo.toml

@@ -20,6 +20,9 @@ workspace = true
 all-features = true
 rustdoc-args = ["--generate-link-to-definition"]
 
+[package.metadata.cargo-shear]
+ignored = ["wayland-cursor"] # TODO(emilk): remove when we update winit
+
 [features]
 default = ["clipboard", "links", "wayland", "winit/default", "x11"]