To me they should've never "deleted" Sunflower. That's not how the audience saw the movie in theaters in 1940.
You play the "it looks racist and demeaning" card, and I say : if anything, it should've stayed as an example of racial stereotyping in the early 40's. Just like the original versions of the OT should stay (in equal, pristine quality but that's another matter) along the SE's to point out that in the late 70's and early 80's there were no 90's cgi effects.
As it is now, we can't see the movie as it was in 1940 on the official dvd, it's like they pretend it never happened, and that's just wrong. If they think it was an error, just leave it there, but politely point it out on the dvd case or whatever. This way you're not butchering the beatiful wort of art that is Fantasia.