Meaning of BaseDtypeTests.test_array_type_with_arg
https://github.com/pandas-dev/pandas/pull/22666 removed that test as (I think) it wasn't functioning properly. The method doesn't take any parameters, so running it would always raise a `TypeError`. Subclasses had to override it, which ends up just duplicating `test_array_type`.

cc @jreback, if you recall the motivation for it.