Remove already published achievements - Google Play Store

As per my question title suggest, I want to remove already published achievements from google play services section.

As per my game update, I don’t require them now. So what way exist to perform this??

Deleting an achievement

Once your achievement has been published, it cannot be deleted.

You can only delete an achievement in a pre-published state by clicking the button labeled Delete at the bottom of the form for that achievement.

Link : Achievements  |  Play Games Services  |  Google for Developers

What a foolish thing.
I created an achievement to do tests my App and obviously to test them I must have published the App (Internal Test). And I can’t take it off anymore? I can understand for a Public Release, but hell, not for my Internal tests!
For developers Google is getting worse and worse.