Hello...
I want to remove the borders from pushbutton so that Breeze-Dark looks flat.
There is no setting on that.
So can anyone tell me where's the pushbutton styling QML file so that I can modify it?
Or is there any other way to do it? I don't want to use kvantum.

Thanks.
Pic:

Breeze widget style is written in C++, source at https://cgit.kde.org/breeze.git/tree/kstyle