Remove comment form allowed tags
<?php
//* Do NOT include the opening php tag shown above. Copy the code shown below.
//* Remove comment form allowed tags
add_filter( 'comment_form_defaults', 'mobile_first_remove_comment_form_allowed_tags' );
function mobile_first_remove_comment_form_allowed_tags( $defaults ) {
$defaults['comment_notes_after'] = '';
return $defaults;
}