是否支持灰度发布删除已有配置

[whl12345]

目前看起来灰度发布功能，只能进行新配置添加，和原有配置修改，没法把删除配置的过程用灰度发布来实现

[whl12345]

我想要将删除主版本某个key的操作实现灰度发布

[nobodyiam]

It's not supported officially. However, there is an Open API for it.

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