Remove unnecessary match

Author: chrisrink10

src/singledispatch/core.rs

@@ -75,10 +75,7 @@ struct SingleDispatchState {
 impl SingleDispatchState {
     fn find_impl(&mut self, py: Python, cls: Bound<'_, PyAny>) -> PyResult<PyObject> {
         let cls_mro = get_obj_mro(&cls.clone())?;
-        let mro = match compose_mro(py, cls.clone(), self.registry.keys()) {
-            Ok(mro) => mro,
-            Err(e) => return Err(e),
-        };
+        let mro = compose_mro(py, cls.clone(), self.registry.keys())?;
         let mut mro_match: Option<PyTypeReference> = None;
         eprintln!("Finding impl for {cls}");
         for typ in mro.iter() {
@@ -136,10 +133,7 @@ impl SingleDispatchState {
             None => {
                 let handler_for_cls = match self.registry.get(&type_reference) {
                     Some(handler) => handler.clone_ref(py),
-                    None => match self.find_impl(py, free_cls.bind(py).clone()) {
-                        Ok(handler) => handler,
-                        Err(e) => return Err(e),
-                    },
+                    None => self.find_impl(py, free_cls.bind(py).clone())?,
                 };
                 self.cache
                     .insert(type_reference, handler_for_cls.clone_ref(py));