提供一个删除 ip 的接口

[forecho]

Is your feature request related to a problem? Please describe.

通过 http://localhost:8899/api/v1/proxies 接口获取到的 IP 有时候并不能用。

Describe the solution you'd like

提供一个删除 ip 的接口，当接口不能使用的时候，会可以通过接口删除 ip

Describe alternatives you've considered

没找到解决方案

Additional context

None

[rickythink]

agree!!!

[imWildCat]

@forecho @RickyWong33 We'll be appreciated if you can submit a PR to do so!