We can remove the `new_framework_defaults_6_1` file by using Rails 6.1
default options and overwriting the one we haven't enabled.
We've experienced problems while running the tests (probably the same
would happen on production) when enabling the `has_many_inversing`
option. For example, after creating a legislation answer for a question
with no answers, calling `question.answers_count` would then return `2`
instead of `1`.
So we aren't enabling this option.
633ccf80f6