@pettanko when nintendo went after yuzu/citra and ryujinx they did so very pointedly. they really wanted those emulators gone. there are so many forks now that would probably be impossible though. surely they understand that even just hitting github would not actually get rid of these emulators.
if it is nintendo doing this, it might be because microsoft owns github and nintendo is doing direct work with microsoft. kind of like how dolphin wasn't allowed on steam, or the n64 portal project was halted. they don't want their collaborators to be hosting their competition.