remove useless translations

Signed-off-by: 21pages <pages21@163.com>

src/lang/cn.rs

@@ -557,6 +557,5 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Check for software update on startup", "启动时检查软件更新"),
         ("upgrade_rustdesk_server_pro_to_{}_tip", "请升级专业版服务器到{}或更高版本！"),
         ("pull_group_failed_tip", "获取组信息失败"),
-        ("No permission", "没有权限"),
     ].iter().cloned().collect();
 }