Bye Bye Pewtie Pie
The whole "freedom of speech" argument is irrelevant. It's a private company who have their rights to disassociate themselves with someone who can possibly damage their image.
PewDiePie is free to make whatever comedic (if you want to call it that) content he wants on YouTube (unless it starts to go against their ToS as well). It's just Disney and Google distancing themselves from it, with whatever consequences that come with it for PewDiePie.