Remove P Tags From Comment Excerpt

I’m using this code in my functions.php which automatically puts an excerpt of the comment being replied to at the top of the reply (see bottom of page).

I’ve tried everything I can think of. Any ideas?

function reply_woohoo($comment) {
$comment_handle = get_comment(get_comment_id());
if ($comment_handle->comment_parent) {
$parent = get_comment($comment_handle->comment_parent );
$parent_author = get_comment_author($parent);
$parent_comment = get_comment_excerpt($parent);
$comment = '<div class="commentreplywoohoo">This is a reply to '.$parent_author.'\'s comment: '.$parent_comment.'</div>' . $comment;
}
return $comment;
}
add_filter('get_comment_text', 'reply_woohoo');