fix: 移除restoreImportState不必要的async关键字

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

ruoyi-ui/src/views/ccdiEmployee/index.vue

@@ -492,7 +492,7 @@ export default {
      * 恢复导入状态
      * 在created()钩子中调用
      */
-    async restoreImportState() {
+    restoreImportState() {
       const savedTask = this.getImportTaskFromStorage();
 
       if (!savedTask) {