Neil said:"I didn't want to have a laugh at someone’s expense," adding that, "I thought we’d matured beyond that."
http://www.gamesradar.com/therell-be-no-donut-drake-uncharted-4/
It seems it´s actually in the code, but they won't release it. (I have tried to find a thread for this to not avail, sorry if old).
Too beautiful for this world...
RIP