Stopped animating oh_noes_guy

Summary:
We did this both because we thought oh noes guy was distracting
and because it resolves T3354 with random errors showing up

Test Plan:
- Open a new PJS project
- make a syntax error
- see oh noes guy appear without animation
- Make the error again and try undoing the error right before oh noes guy appears
- despite many attempts never have oh noes guy show up after you have fixed the error

Reviewers: pamela

Reviewed By: pamela

Subscribers: #cs

Maniphest Tasks: T3354

Differential Revision: http://phabricator.khanacademy.org/D14569