Update automated-tasks-with-cron-jobs.md

sync with english version

content/zh/docs/tasks/job/automated-tasks-with-cron-jobs.md

@@ -28,17 +28,6 @@ Cron jobs can also schedule individual tasks for a specific time, such as if you
 
 CronJobs 在创建周期性以及重复性的任务时很有帮助，例如执行备份操作或者发送邮件。CronJobs 也可以在特定时间调度单个任务，例如你想调度低活跃周期的任务。
 
-<!--
-CronJob resource in `batch/v2alpha1` API group has been deprecated starting from cluster version 1.8.
-You should switch to using `batch/v1beta1`, instead, which is enabled by default in the API server.
-Examples in this document use `batch/v1beta1` in all examples.
--->
-{{< note >}}
-从集群版本 1.8 开始，`batch/v2alpha1` API 组中的 CronJob 资源已经被废弃。
-你应该切换到 API 服务器默认启用的 `batch/v1beta1` API 组。
-本文中的所有示例使用了 `batch/v1beta1`。
-{{< /note >}}
-
 <!--
 Cron jobs have limitations and idiosyncrasies.
 For example, in certain circumstances, a single cron job can create multiple jobs.
@@ -179,10 +168,12 @@ Hello from the Kubernetes cluster
 <!--
 ## Deleting a Cron Job
 
-When you don't need a cron job any more, delete it with `kubectl delete cronjob`:
+When you don't need a cron job any more, delete it with `kubectl delete cronjob <cronjob name>`：
 -->
 
-当你不再需要 CronJob 时，可以用 `kubectl delete cronjob` 删掉它：
+## 删除 CronJob
+
+当你不再需要 CronJob 时，可以用 `kubectl delete cronjob <cronjob name>` 删掉它：
 
 ```shell
 kubectl delete cronjob hello