is one piece episode 484 filler?

Ace smiled one last time and passes away, falling from his brother's arms as the last fragment of his vivre card burns away. Luffy remembered when Ace punched him on the head in the past for crying when he thought Ace was dead, after which Ace made a promise not to die and leave his weak little brother alone.

Now back in the present, kneeling by his brother's body, Luffy raised his head and howls in mindless grief. The Whitebeard Pirates as well as the entire Sabaody are shocked at the death of Ace.