[CLEANUP] use debug helpers from ember-data/debug

[pangratz]

By this, the calls to assert, warn etcetera are corectly stripped
when a new production build is created.

cc @fivetanley

[fivetanley]

LGTM, although I don't think this actually removes them quite yet because we don't have any broccoli modules for that I think.

[fivetanley]

Appveyor is failing due to some syntax errors.

[pangratz]

although I don't think this actually removes them quite yet because we don't have any broccoli modules for that I think.

Hmm, I am not sure. Doing a ember build --environment=production and searching for assert shows that dist/globals/ember-data.js contains the calls, whereas dist/globals/ember-data.prod.js doesn't. So it seems that they are removed, right?

[fivetanley]

I barely remember doing this, but here we are :p https://github.com/emberjs/data/blob/master/lib/javascripts.js#L60

[pangratz]

Hooray 🎉