Firebase included by default, how to remove?

I just started using the framework with this guide:

So i got it compiled and it all works well, but when I open up exodus scanner, it tells me there are firebase trackers in the app! How can I remove that google crap? I followed the tutorial (except the code, just left it as it was).
How can I remove all the propietary parts of the build like firebase or other GSF trash?