Do not unset comment_notes_before

Keeps the notice intact about not publishing email addresses.

templates/single-product-reviews.php

@@ -68,7 +68,6 @@ if ( ! comments_open() ) {
 					$comment_form = array(
 						'title_reply'          => have_comments() ? __( 'Add a review', 'woocommerce' ) : sprintf( __( 'Be the first to review “%s”', 'woocommerce' ), get_the_title() ),
 						'title_reply_to'       => __( 'Leave a Reply to %s', 'woocommerce' ),
-						'comment_notes_before' => '',
 						'comment_notes_after'  => '',
 						'fields'               => array(
 							'author' => '<p class="comment-form-author">' . '<label for="author">' . __( 'Name', 'woocommerce' ) . ' <span class="required">*</span></label> ' .