This does seem a bit absurd to me. What's next, deleting historical footage of Queen Victoria because she was a staunch colonialist? Deleting footage of tennis matches involving Zverev because he was a domestic abuser? Deleting historical films that involved cast members that did some truly abysmal things off screen? Where do you draw the line between what gets kept and what doesn't?
Trying to rewrite history doesn't work. You can't delete the fact that there have been truly horrible people throughout history. By all means shame them, remove their name, and make it abundantly clear that their actions are unsupportable, but the precedent of "this person has done something horrible, lets just pretend they didn't exist" creates a rather woeful precedent. The fact remains that Huw Edwards announced the Queen's death - it was a historic moment, and the fact he's been found to have done some very perverse things does not mean that that significant piece of history should be erased.