There is a comment in the source code saying that they were abandoned to save a floppy disk, and expressing some (joking-sounding) hope that they’d appear in a directors cut release.
That's the same cutscene someone on the Monkey Island 1 SE team described in this 2009 blog post about the original source code:
The post is truncated as is, but I'd say the idea is "...he goes into the Monkey Head and the mouth closes behind him."
The document is done and online. Dig in! Have fun! There are a couple more things in there that were not shown in the anniversary stream.
https://gamehistory.org/monkeyisland/