I have found two things on Microsoft Tech Community which are for no use for the users and just staying there. those are as follows:
1. Showing the count of likes a user has given, there is no use of showing how many likes a single user has given to the post as one user can give only one like to a post:
2. Title of replies - There is no need to have an editable reply title because it will only create confusion and the default "RE:" title should be only there for replies:
