Tips on Customizing Kubio AI Page Builder

How to Hide Kubio Admin Menus

function plt_hide_kubio_menus() {
	//Hide "Kubio".
	remove_menu_page('kubio');
	//Hide "Kubio → Open Kubio Editor".
	remove_submenu_page('kubio', 'kubio');
	//Hide "Kubio → Get Started".
	remove_submenu_page('kubio', 'kubio-get-started');
	//Hide "Kubio → Starter Sites".
	remove_submenu_page('kubio', 'http://127.0.0.1/wp-admin/admin.php?tab=demo-sites&page=kubio-get-started');
	//Hide "Kubio → Kubio AI".
	remove_submenu_page('kubio', 'http://127.0.0.1/wp-admin/admin.php?tab=ai-info&page=kubio-get-started');
	//Hide "Kubio → Upgrade to PRO".
	remove_submenu_page('kubio', 'http://127.0.0.1/wp-admin/admin.php?tab=pro-upgrade&page=kubio-get-started');

	//Hide "Appearance → Edit with Kubio".
	remove_submenu_page('themes.php', 'http://127.0.0.1/wp-admin/admin.php?page=kubio');
	//Hide "Appearance → Background".
	remove_submenu_page('themes.php', 'customize.php?autofocus%5Bcontrol%5D=background_image');
	//Hide "Appearance → Templates".
	remove_submenu_page('themes.php', 'edit.php?post_type=wp_template');
	//Hide "Appearance → Template Parts".
	remove_submenu_page('themes.php', 'edit.php?post_type=wp_template_part');
	//Hide "Appearance → Background".
	remove_submenu_page('themes.php', 'custom-background');
}

add_action('admin_menu', 'plt_hide_kubio_menus', 1001);

Where do I put this code?

How to Hide the "Post Attributes" Meta Box

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

	//Hide the "Post Attributes" meta box.
	remove_meta_box('pageparentdiv', $screen->id, 'side');
}

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