update controllers syntax

[miguelcobain]

Not much here, but trying to update the various addon parts one at a time.
I removed the addon/controllers/docs/api/class.js controller, since I didn't see any usage of it.

[SergeAstapov]

test-apps/new-addon/tests/dummy/app/controllers/route-using-compile-markdown.js looks good!

would leave call about docs/api/class controller to @rwwagner90

[RobbieTheWagner]

@miguelcobain I would think that controller would be used somewhere, but I don't know. Looks like to me it's the controller to automatically generated method names for the auto generated docs?

[miguelcobain]

@rwwagner90 a global search for methodParams yields no results in the whole repository.
Would that controller be used on the consuming app?

[RobbieTheWagner]

@miguelcobain perhaps you are right. It could be a leftover thing.

[miguelcobain]

@rwwagner90 tried searching on ember observer for methodParams. No results that seem to use this. Same for docs/api/class, so nothing is importing the controller.