Remove Metaboxes

I don’t think this will ever fire….

Is_admin() detects admin UI not admin priveleges… Try:

if (is_admin()) : 
function my_remove_meta_boxes()  { 
if( !current_user_can('manage_options') )  { 
    remove_meta_box(...);
}}
add_action( 'admin_menu', 'my_remove_meta_boxes' );
endif;