You mean the Lysine Contingency? They mentioned it, but never really addressed it afterwards like the book did. It wasn't unneeded at all, the dinos just started to eat lysine-rich foods, but they still needed lysine. Also, even in the book he wasn't about to openly ban all of Muldoon's guns; they compromised on how many he was allowed to have, and how and where to store them. I don't believe it's addressed in the movie at all, though, dive they charge the focus of the primary antagonist to the raptors which didn't need the most specialized gun and neurotoxin they could get.