Disable autosave for custom post type not working

Hi, I have created custom post type. And I have a problem without auto-drafts which are save always when I open an “add new form” or refresh it?
So I would like to disable autosave function only for my post type.

My post type:

$args = array(
                        'labels'              => $labels,
                        'public'              => false,
                        'capability_type'     => 'my_post_type',
                        'exclude_from_search' => true,
                        'publicly_queryable'  => true,
                        'show_ui'             => true,
                        'show_in_nav_menus'   => false,
                        'show_in_menu'        => true,
                        'show_in_admin_bar'   => true,
                        'menu_position'       => 5,

                        'hierarchical'        => false,
                        'supports'            => array( 'title', 'author' ),
                        'rewrite'             => false,
                        'query_var'           => false,
                        'has_archive'         => false,
                        'register_meta_box_cb' => array( $this, 'remove_meta_boxes' ),
                );

                register_post_type( 'my_post_type', $args );

I added an action in my construct method:

add_action( 'admin_print_scripts', array( $this, 'disable_autosave' ), 999 );

public function disable_autosave( ) {
            global $wp_scripts;
            print_R($wp_scripts); //there is autosave

                wp_deregister_script( 'autosave' );
print_R($wp_scripts); //there isn't

        }

wp_deregister_script function removed autosave form array, but the post was autosaved.

How can I do this?