clippy: remove unneeded return statements (#31923)

components/script/dom/bindings/interface.rs

@@ -602,7 +602,7 @@ fn get_proto_id_for_new_target(new_target: HandleObject) -> Option<PrototypeList
             let dom_class = &(*domjsclass).dom_class;
             return Some(dom_class.interface_chain[dom_class.depth as usize]);
         }
-        return None;
+        None
     }
 }
 
@@ -698,6 +698,6 @@ pub fn get_desired_proto(
         }
 
         maybe_wrap_object(*cx, desired_proto);
-        return Ok(());
+        Ok(())
     }
 }

components/script/dom/bindings/str.rs

@@ -448,7 +448,7 @@ impl DOMString {
                 return Some(val);
             }
         }
-        return None;
+        None
     }
 
     /// <https://html.spec.whatwg.org/multipage/#best-representation-of-the-number-as-a-floating-point-number>

components/script/dom/bindings/structuredclone.rs

@@ -107,7 +107,7 @@ unsafe fn write_blob(
         "Writing structured data for a blob failed in {:?}.",
         owner.get_url()
     );
-    return false;
+    false
 }
 
 unsafe extern "C" fn read_callback(
@@ -134,7 +134,7 @@ unsafe extern "C" fn read_callback(
             &mut *(closure as *mut StructuredDataHolder),
         );
     }
-    return ptr::null_mut();
+    ptr::null_mut()
 }
 
 unsafe extern "C" fn write_callback(