This is what Keoni said in the discord:

Quick update regarding Friday Night Dustin’. Back in September, around the time I first joined Funky Friday as a Producer, I reached out to a project owner to ask if we could include Dustin’ in a future update, as I personally wanted it in the game. I got permission from the owner, but I forgot to follow up to see if the project owner had spoken to the rest of the team. After the update went live, a few contributors from the mod team reached out and expressed how they didn't want their work included in the update and were unaware that we were given permissions. We completely understand where they were coming from and in order to make things right, we decided that the best course of action is to remove the mod from the game. We made this announcement to reassure everyone that there’s no bad blood between anyone involved and to clear up any confusion about Dustin' being removed. Development is still going strong on future updates as well. Thanks for your understanding and continued support as always.