The full sentence describing the editing in the article starts with “antiquated and offensive language”, which one might interpret to mean the removed words were both of those things, or one could also interpret that antiquated language and offensive language were removed as two possibly overlapping sets.

The point of the dictionary is to use “contemporary English” since it’s used as a reference in schools. I’ve definitely seen “fop” before but in high school I wouldn’t say it’s something that I could remember without looking it up in a second dictionary, so it’s not that useful of a defining term. All this offensive or nonoffensive is mountains out of a molehill.