deleting old files

git-svn-id: https://plugins.svn.wordpress.org/a-very-simple-captcha/trunk@845503 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated to 3.8.1

git-svn-id: https://plugins.svn.wordpress.org/a-very-simple-captcha/trunk@845504 b8457f37-d9ea-0310-8a92-e5e31aec5664