EDITORS can delete cache!?

It isn’t possible without PHP. You should unhook actions which adds admin bar. An example:

add_action( 'init', function() {
        if ( ! current_user_can( 'manage_options' ) ) {
                remove_action( 'admin_init', 'admin_bar_delete_page' );
                remove_action( 'admin_bar_menu', 'wpsc_admin_bar_render', 99 );
        }
}, 9 );

I didn’t check code, but it should work. You can replace manage_options with other capability.