Exclude a Metabox when Page is nominated as page_on_front

gistfile1.phtml

                function myplugin_include_in_menu_meta_box() {
                        // Assign the ID of the page we're attempting to edit to a variable.
                        if ( isset( $_GET['post'] ) ) { $post_id = $_GET['post']; }
                        elseif ( isset( $_POST['post_ID'] ) ) { $post_id = $_POST['post_ID']; }
                        
                        // Display metabox if we're creating a new page or editing a page other than the Homepage.
                        $front_page = get_option('page_on_front'); 
                        if ( ! isset($post_id) || ($post_id != $front_page) ) { 
                                add_meta_box( 'myplugin_include_in_menu', __( 'Include in Navigation' ), 'myplugin_include_in_menu_meta_box_callback', 'page', 'side', 'default' );
                        }
                }
                add_action( 'add_meta_boxes', 'myplugin_include_in_menu_meta_box' );