Remove ReadyGraph menus from Subscribe2 core, now in stand alone plugin

git-svn-id: https://plugins.svn.wordpress.org/subscribe2/trunk@933226 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove ReadyGraph menus from Subscribe2 core, now in stand alone plugin

git-svn-id: https://plugins.svn.wordpress.org/subscribe2/trunk@933228 b8457f37-d9ea-0310-8a92-e5e31aec5664