[Plugin: WordPress HTTPS (SSL)] Remove Force SSL from add / edit post admin page

Hi,

I have a multi user website and I would like to remove the “Force SSL” check box for contributors.

I tried adding this in the function.php file but it doesn’t seem to work:

remove_action(‘post_submitbox_misc_actions’, array(‘WordPressHTTPS’, ‘post_checkbox’));

Any idea?

http://wordpress.org/extend/plugins/wordpress-https/