Remove Rubocop exclusion of api tests
Remove Rubocop exclusion of api tests

The tests were just deleted, so the exclusion is useless.

MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer