How to Hide WPElemento Importer Admin Menus

function plt_hide_wpelemento_importer_menus() {
	//Hide "Templates".
	remove_menu_page('elemento-templates');
	//Hide "Appearance → Install Plugins".
	remove_submenu_page('themes.php', 'wpelemento-importer-tgmpa-install-plugins');

	//Hide "Quick Start".
	remove_menu_page('wpelementoimporter-wizard');
	//Hide "Quick Start → Quick Start".
	remove_submenu_page('wpelementoimporter-wizard', 'wpelementoimporter-wizard');
	//Hide "Quick Start → Our Free Themes".
	remove_submenu_page('wpelementoimporter-wizard', 'wpelemento_importer_free_themes');
}

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

Where do I put this code?