Deleting old file

git-svn-id: https://plugins.svn.wordpress.org/a-very-simple-captcha/trunk@916940 b8457f37-d9ea-0310-8a92-e5e31aec5664
Very Simple Captcha Update 2.4.2, Support 3.9.1

git-svn-id: https://plugins.svn.wordpress.org/a-very-simple-captcha/trunk@916941 b8457f37-d9ea-0310-8a92-e5e31aec5664