How to Hide WP ULike Admin Menus

function plt_hide_wp_ulike_menus() {
	//Hide "WP ULike".
	remove_menu_page('wp-ulike-settings');
	//Hide "WP ULike → Settings".
	remove_submenu_page('wp-ulike-settings', 'wp-ulike-settings');
	//Hide "WP ULike → Customize".
	remove_submenu_page('wp-ulike-settings', 'wp-ulike-customize');
	//Hide "WP ULike → Statistics".
	remove_submenu_page('wp-ulike-settings', 'wp-ulike-statistics');
	//Hide "WP ULike → About".
	remove_submenu_page('wp-ulike-settings', 'wp-ulike-about');
	//Hide "WP ULike → Go Pro					Upgrade".
	remove_submenu_page('wp-ulike-settings', 'wp-ulike-go-pro');
}

add_action('admin_menu', 'plt_hide_wp_ulike_menus', 11);
Where do I put this code?