Originally Posted by 20degrees
Xposed. G3 tweaks box.
I'm looking for this too, but I am not seeing it in G3 TweaksBox. There is a "Disable Safety Headset Volume" option, but that is just to prevent the phone from turning the volume down when plugging in earphones. I see nothing for getting rid of that annoying popup.
Edit: Looks like it does both, even though it doesn't explicitly say that.