comment moderation email only to the author

How is it possible (in 1-2 lines of code, without a plugin) to prevent sending moderation emails to the admin?
I’d like modertaion emails for unapproved comments to be sent to the post’s author only.

1728      if ( 'spam' !== $commentdata['comment_approved'] ) { // If it's spam save it silently for later crunching
1729          if ( '0' == $commentdata['comment_approved'] ) {
1730              wp_notify_moderator( $comment_ID );
1731          }
1732
1733          // wp_notify_postauthor() checks if notifying the author of their own comment.
1734          // By default, it won't, but filters can override this.
1735          if ( get_option( 'comments_notify' ) && $commentdata['comment_approved'] ) {
1736              wp_notify_postauthor( $comment_ID );
1737          }
1738      }