Gunma-chan, Aoma, and Meemi visit the Haniwa Art Festival and considers what counts as "art". A look into a day of the life of Gunma-chan's Mom and her many jobs. Uncle Akio takes Gunma-chan, Aoma, and Meemi to eat udon noodles.
In other words, it means "something 
unnecessary and uncalled for".
Überflüssige Dinge braucht man nicht.
En resumen, significa
algo innecesario e inoportuno.
En resumen, significa
algo innecesario e inoportuno.
Superflu désigne donc
quelque chose d’inutile et en trop.
In poche parole, significa
"qualcosa di non necessario e non richiesto".
Ou seja, é algo inútil
e que ninguém quer.
Они ей абсолютно не нужны,
в этом и смысл выражения.