https://www.gamespot.com/articles/why-fortnites-popular-bouncer-item-was-removed/1100-6462248/

Epic has been introducing new items and weapons to Fortnite on a nearly weekly basis since the title's become a global hit, but to keep the item pool balanced, the developer also periodically moves some into the "vault," effectively removing them from the game. At the start of Season 6 last week, the studio vaulted an inordinately high number of items, and now we know why one of them was removed.

On Twitter (via Fortnite Intel), Epic Games Community Coordinator Sean Hamilton explained why the Bouncer was among the items removed from Fortnite last week. "[W]e removed Bouncers due to the influx of recent mobility items as well as more that we have planned for the future," Hamilton wrote.