comment replying

It will affect your ability to style comments. What are you trying to accomplish?

reducing unused classes. as for styling, i thought it’s only need a class?

It harms nothing.

true. thanks anyway

You could use a filter on comment_class to remove all classes. https://developer.www.ads-software.com/reference/hooks/comment_class/

Write a plugin for this or add to your theme’s functions.php