Either way, it’s probably fine that he isn’t in the movie, as Logan seems to work just peachy without the addition of another character.
When CinemaBlend spoke to Logan screenwriter Scott Frank, he revealed that there was talk of having Schreiber reprise his role, but in the end that idea was thrown out.
Well, he didn’t end up in Logan, ultimately, but there was a plan in the works at one point to have him arrive for a few scenes towards the middle of the movie.
Now that you mention it! I wouldn’t swear to it, but we thought that would have been an interesting thing to do.