Note that this will only hide/show *future* reblogs by a user, and does
nothing to remove/add reblogs that are already in the timeline. I don't
think that's a particularly confusing behavior, and it's a lot easier
to implement (similar to mutes, I believe).
* Add a test for FollowRequest#authorize!
* Remove tests
There is no need to test
ActiveModel::Validations::ClassMethods#validates.
* Make an alias of destroy! as reject!
Instead of defining the method,
make an alias of destroy! as reject! because of reducing test.
