I remember (sad that I am) some lines being cut out of BBC1 repeat shows. One was the reference to athlete Zola Budd "so I said, to Zola, and Zola said to me" (perhaps cause in this day and age people thought of Zola as the former Chelsea footballer Gianfranco). I forget the episode but it was circa 1986.
The other was when Grandad was talking about getting intimate in bed with his late wife (about 1983) and ended up talking about "steak and kidney pudding". Almost the whole dialogue was cut out on the repeat, yet it isn't remotely offensive.
I'm sure there was more missing stuff but I'm not sure. I'm struggling to think of anything racist though (bar the dodgy comments already mentioned). Perhaps it is just stuff that is outdated and would make no sense today.