How to Hide Hover Effects Admin Menus

function plt_hide_hover_effects_menus() {
	//Hide the "Wow Plugins" menu.
	remove_menu_page('wow-company');
	//Hide the "Wow Plugins → Welcome" menu.
	remove_submenu_page('wow-company', 'wow-company');
	//Hide the "Wow Plugins → Hover Effects" menu.
	remove_submenu_page('wow-company', 'hover-effects');
}

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

Where do I put this code?