How to Hide Amelia Admin Menus

function plt_hide_ameliabooking_menus() {
	//Hide "Amelia".
	remove_menu_page('amelia');
	//Hide "Amelia → Dashboard".
	remove_submenu_page('amelia', 'wpamelia-dashboard');
	//Hide "Amelia → Calendar".
	remove_submenu_page('amelia', 'wpamelia-calendar');
	//Hide "Amelia → Appointments".
	remove_submenu_page('amelia', 'wpamelia-appointments');
	//Hide "Amelia → Events".
	remove_submenu_page('amelia', 'wpamelia-events');
	//Hide "Amelia → Services".
	remove_submenu_page('amelia', 'wpamelia-services');
	//Hide "Amelia → Locations".
	remove_submenu_page('amelia', 'wpamelia-locations');
	//Hide "Amelia → Customers".
	remove_submenu_page('amelia', 'wpamelia-customers');
	//Hide "Amelia → Finance".
	remove_submenu_page('amelia', 'wpamelia-finance');
	//Hide "Amelia → Notifications".
	remove_submenu_page('amelia', 'wpamelia-notifications');
	//Hide "Amelia → Customize".
	remove_submenu_page('amelia', 'wpamelia-customize');
	//Hide "Amelia → Custom Fields".
	remove_submenu_page('amelia', 'wpamelia-cf');
	//Hide "Amelia → Settings".
	remove_submenu_page('amelia', 'wpamelia-settings');
	//Hide "Amelia → What's new".
	remove_submenu_page('amelia', 'wpamelia-whats-new');
	//Hide "Amelia → Lite vs Premium".
	remove_submenu_page('amelia', 'wpamelia-lite-vs-premium');
}

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