How to Hide Meal Tracker Admin Menus

function plt_hide_meal_tracker_menus() {
	//Hide "Meal Tracker".
	remove_menu_page('yk-mt-main-menu');
	//Hide "Meal Tracker →".
	remove_submenu_page('yk-mt-main-menu', 'yk-mt-main-menu');
	//Hide "Meal Tracker → User Data".
	remove_submenu_page('yk-mt-main-menu', 'yk-mt-user');
	//Hide "Meal Tracker → Meal Collection".
	remove_submenu_page('yk-mt-main-menu', 'yk-mt-meals');
	//Hide "Meal Tracker → Setup Wizard".
	remove_submenu_page('yk-mt-main-menu', 'yk-mt-setup-wizard');
	//Hide "Meal Tracker → Upgrade to Pro".
	remove_submenu_page('yk-mt-main-menu', 'yk-mt-license');
	//Hide "Meal Tracker → Settings".
	remove_submenu_page('yk-mt-main-menu', 'yk-mt-settings');
	//Hide "Meal Tracker → Help".
	remove_submenu_page('yk-mt-main-menu', 'yk-mt-help');
}

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