[bug 1016466] Remove funfactory

Funfactory... It's not you, it's me. We're just not good for each other
anymore. I look to the future, and it's a future of double rainbows and
misty sunrises. It's a future where I've got more control and in turn
more responsibility. It's a future where I'm empowered to have my own
successes, and my own mistakes. Maybe I'll double the Firefox userbase.
Maybe I'll become the cornerstone of a bad news cycle (again). I don't
know for certain what will happen, but I know it needs to happen without
you.

Be well, Funfactory. I hope we can still be friends.
[bug 1016466] Remove funfactory submodule

RIP.
Nix unused code
Nix uninteresting comment
Remove CEF-related things

We're not using CEF at all, so this removes it.
Merge pull request #322 from willkg/1016466-nix-funfactory

1016466 nix funfactory