chore: improve code

Author: edison1105

packages/runtime-core/src/hydration.ts

@@ -375,9 +375,8 @@ export function createHydrationFunctions(
       if (isTemplateNode(el)) {
         needCallTransitionHooks =
           needTransition(parentSuspense, transition) &&
-          parentComponent &&
-          parentComponent.vnode.props &&
-          parentComponent.vnode.props.appear
+          vnode.props &&
+          vnode.props.appear
 
         const content = (el as HTMLTemplateElement).content
           .firstChild as Element