Various websites say "The Sword in the Stone (1963) UK DVD" omits the following:
Part of Madam Mim's first line "Sounds like someone's sick. How lovely. I do hope it's serious. Something dreadful." She now says "Sounds like someone's sick. How lovely."
I also read on a disney-wiki somewhere, this edited line version might be used on Disney+ (if that is at all relevant).
There is no mention of this edit on the "The Sword in the Stone (1963)" DVD page here on dvdcompare.
There are x2 UK DVD releases listed here on dvdcompare - based on moviecensorship comparison, it looks like this line is specifically edited on the UK 45th Anniversary Edition. (Unknown if the earlier UK 2002 DVD release is affected or not)
Oh I'm sorry, I forgot to say, I don't have any copies myself - my data is coming purely from these other websites. Nor do I have access to Disney+ - so I cannot confirm anything am afraid.
I can include two other website links that say similar things I have already mentioned, but it did occur to me that all these websites might just be copy+pasting the same notes from one to another - so no guarantee what they say is accurate I guess.
The UK DVD version omits the second half of Madam Mim's first line "Sounds like someone's sick. How lovely. I do hope it's serious. Something dreadful" for unknown reasons. She only says "Sounds like someone's sick. How lovely." This version would be used on Disney+.
The scene where Madam Mim says "Sounds like someone’s sick. How lovely. I do hope it’s something serious. Something dreadful." it was changed to "Sounds like someone’s sick. How lovely."