Simplify Observation.without_sequence
Simplify Observation.without_sequence

See https://github.com/MushroomObserver/mushroom-observer/pull/1082#discussion_r933918320

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