How to hide the blog comments section "You may use these HTML tags"

This is a section from WordPress intended to show blog visitors what tags they can use when writing a comment. If you don't want it, you can hide it by putting the following under Appearance > Customize > Additional CSS:

p.form-allowed-tags {
display: none;

If you want to remove it entirely (using a child theme) the template file is: templates/comments.php

Related: Disable or Remove Comments