Where does the DontDestroyOnLoad object come from?

Question

Unity

I did the last project, this never popped up, but then I just started doing it, I just launched an empty scene and the DontDestroyOnLoad object appeared in the hierarchy with a child Variables Saver, where did it come from? why all of a sudden? Why?
I updated unity between projects, maybe this is an innovation or what is it?
How to remove it so that it does not appear? And then there is something that I did not plan ...

Answer 1

some plugin. See where the Variables Saver script is