删除有设备关联的路口，前端页面无反应

[cmycoups]

Describe the bug

A clear and concise description of what the bug is.

To Reproduce

Steps to reproduce the behavior:

1. 新建路口
2. 新建 RSU ，与该路口关联
3. 删除路口
4. 点击确认删除，前端页面无反应，后端接口返回网络错误

Expected behavior

A clear and concise description of what you expected to happen.
点击确认删除，前端弹窗提示【该路口类型已关联数据，不允许删除，若需删除，请先取消关联】

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Log Information

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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Additional context

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[cmycoups]

#169