refactor: remove unnecessary variable (#401)

packages/runtime-core/src/component.ts

@@ -246,8 +246,7 @@ export function setupStatefulComponent(
     if (Component.components) {
       const names = Object.keys(Component.components)
       for (let i = 0; i < names.length; i++) {
-        const name = names[i]
-        validateComponentName(name, instance.appContext.config)
+        validateComponentName(names[i], instance.appContext.config)
       }
     }
     if (Component.directives) {