Remove custom QUnit-PhantomJS bridge.

[bardiharborow]

The file is effectively the same as the default, except for a .bind() polyfill, which is unnecessary now that we have dropped IE8.

[mdo]

Can I get a review from @cvrebert or @Johann-S?

[Johann-S]

If you remove the bridge QUnit result will be :

Instead of :

Which is less verbose than with the bridge.

But yes it's interesting to remove the bind polyfill but I'm not sure about the Phantom Bridge which allow us to have more details on tests results.

[bardiharborow]

Hmm. I missed that. Not sure whether being slightly more verbose warrants the extra file, especially given how quiet the other build commands are already.

A failing test looks like this. Seems like there is still plenty of verboseness when something goes wrong.

[Johann-S]

Instead of delete this file why not convert it to ES6 @bardiharborow ?

[bardiharborow]

Punting on this for right now due to concerns by @Johann-S. I'll revisit later.

[Johann-S]

Sorry I thought you transformed all our JS tests in ES6 but it's not the case. But yes I'm not sure of the interest of this PR except the removal of the bind polyfill