>>541611624
>repo entries
And after you remove them and pacman -Syu, run pacman -Qqm to find any leftover packages, if there even are any. Search / for 'eos' and you might find a file or two like their now unused mirrorlist you can remove but they aren't doing any harm.

I'm pretty sure that's everything if you made sure to uncheck all eos packages during installation. Super simple and nice to do from a GUI instead of working from a CLI until you have a usable desktop.