Apply suggestions from code review

Author: Oreoxmt

zh/backup-to-aws-s3-using-br.md

@@ -1048,8 +1048,6 @@ kubectl get bk -l tidb.pingcap.com/backup-schedule=demo1-backup-schedule-s3 -n t
 
 2. `backupSchedule` 创建完成后，可以通过以下命令查看定时快照备份的状态：
 
-    {{< copyable "shell-regular" >}}
-
     ```shell
     kubectl get bks -n backup-test -o wide
     ```

zh/backup-to-azblob-using-br.md

@@ -836,8 +836,6 @@ kubectl get backup -l tidb.pingcap.com/backup-schedule=demo1-backup-schedule-azb
 
 1. 在 `backup-test` 这个 namespace 中创建一个名为 `integrated-backup-schedule-azblob` 的 `BackupSchedule` CR。
 
-    {{< copyable "shell-regular" >}}
-
     ```shell
     kubectl apply -f integrated-backup-scheduler-azblob.yaml
     ```