Constructors are now always autowired

[javiereguiluz]

As of symfony/symfony#21306 the constructor is now always autowired, so there's no need to add __construct here:

services:
    Foo\Bar: { autowire: ['__construct', 'set*'] }

[weaverryan]

Closing this. In 3.3, it's the same behavior as 3.2, so there's nothing to change (except to doc the ability to autowire method calls, but that's a different issue already)