Get rid of Comments and Share boxes from Word 2021 Ribbon

I just installed Microsoft Home and Student 2021 to upgrade Word and found new little drop-down menu boxes for “Comments” and “Share” in the Ribbon. I’m guessing it’s a long shot, but I only work offline and is there any way to get rid of them as they are features I will never use?

For that matter I have never used “Sign in” either and it is all clutter.