Tips on Customizing Banner Slider for Advertisement

How to Hide Banner Slider for Advertisement Admin Menus

function plt_hide_banner_slider_for_advertisement_menus() {
	//Hide "Banner Slider".
	remove_menu_page('edit.php?post_type=wpwbs');
	//Hide "Banner Slider → Banner Slider".
	remove_submenu_page('edit.php?post_type=wpwbs', 'edit.php?post_type=wpwbs');
	//Hide "Banner Slider → Add Banner Slider".
	remove_submenu_page('edit.php?post_type=wpwbs', 'post-new.php?post_type=wpwbs');
	//Hide "Banner Slider → Plugin Settings".
	remove_submenu_page('edit.php?post_type=wpwbs', 'wpwbs_settings');
}

add_action('admin_menu', 'plt_hide_banner_slider_for_advertisement_menus', 11);

Where do I put this code?

How to Hide the "Banner Slider Settings" Meta Box

function plt_hide_banner_slider_for_advertisement_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Banner Slider Settings" meta box.
	remove_meta_box('wpbsc_sectionid', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_banner_slider_for_advertisement_metaboxes', 20);