How to Hide WowRevenue Admin Menus

function plt_hide_revenue_menus() {
	//Hide "WowRevenue".
	remove_menu_page('revenue');
	//Hide "WowRevenue → Overview".
	remove_submenu_page('revenue', 'admin.php?page=revenue#/');
	//Hide "WowRevenue → Campaigns".
	remove_submenu_page('revenue', 'admin.php?page=revenue#/campaigns');
	//Hide "WowRevenue → Analytics".
	remove_submenu_page('revenue', 'admin.php?page=revenue#/analytics');
	//Hide "WowRevenue → Suggest Features".
	remove_submenu_page('revenue', 'https://www.wowrevenue.com/roadmap/');
	//Hide "WowRevenue → Upgrade Pro".
	remove_submenu_page('revenue', 'https://account.wpxpo.com/checkout/?edd_license_key=');
}

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