Without reading the comments on the article, there are multiple possible reasons for removing Raskin’s name. The article comments make clear that Raskin didn’t want his name removed. The other possibility was that he did want that, for example because the artist made it less functional. And then he might have asked Jobs to remove his name, and Jobs complied.
A person has the right to take their name off a work if that person doesn’t like how the collaboration affects the work.
The article makes it clear that Raskin wanted to be credited.
"Jobs then ordered Raskin’s name removed as the creator of the work and placed the artist’s name in its place."