We can remove the `new_framework_defaults_6_0` file by using Rails 6.0
default options and overwriting the ones we haven't enabled.
We're still using the classic autoloader because we still haven't
checked how switching to zeitwerk will affect the way CONSUL
installations customize their code.
And we're using the default queues for Active Storage because we were
already using them and that will be the default option in Rails 6.1.