https://www.gamespot.com/articles/destiny-2-dev-is-no-longer-selling-emote-that-lets/1100-6454126/

Destiny 2 features a bunch of amusing emotes that you can purchase, and one of the best is a Monty Python-inspired, high-kicking walk. However, it turns out that the emote let players get into some walled-off, unfinished areas--and now, Bungie has removed it from sale.

Although the developer hasn't officially given a reason for its removal, the cause seems pretty clear. Numerous YouTube videos show players utilizing the move to clip through walls; the one below, for example, shows one player getting into the Eververse Trading Company's booth.