Quote 引用元：Usho 投稿を閲覧
Kinda already knew that but I was concerned they might have removed them as rewards, hence why I asked the question. Guess not everyone here knows how to read.
If they had removed them you wouldn't see them in the in-game achievements list. Or do you mean that they would somehow have removed them without changing the achievements? That would make little sense.
As long as you see the reward in the achievement list then it has - pretty much by definition - not been removed.

SE could concievably remove the rewards at some point in the future, but as far as I know they have never changed any existing achievements in order to remove rewards from them. It is just not the kind of thing they normally do.