Remove remaining jQuery from View tests

Now that #3003 is merged, we need an easy way for alternative View implementations to run against our View conformance test. This pulls jQuery out of the View tests except in for checking `view.$el instanceof Backbone.$` (which all jQuery-like apis should support).
Yeah it might be nice to get something like Sauce labs testing in here too since we're concerned about older browsers. 

Shame about that bug though.