How to Hide WPL Admin Menus

function plt_hide_real_estate_listing_realtyna_wpl_menus() {
	//Hide "WPL".
	remove_menu_page('WPL_main_menu');
	//Hide "WPL → WPL".
	remove_submenu_page('WPL_main_menu', 'WPL_main_menu');
	//Hide "WPL → Data Structure".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_data_structure');
	//Hide "WPL → Flex".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_flex');
	//Hide "WPL → Locations".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_locations');
	//Hide "WPL → Settings".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_settings');
	//Hide "WPL → Activity Manager".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_activity');
	//Hide "WPL → Notifications".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_notifications');
	//Hide "WPL → User Manager".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_user_manager');
	//Hide "WPL → My Profile".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_profile');
	//Hide "WPL → Add Listing".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_add_listing');
	//Hide "WPL → Listing Manager".
	remove_submenu_page('WPL_main_menu', 'wpl_admin_listings');
	//Hide "WPL → Organic IDX".
	remove_submenu_page('WPL_main_menu', 'wpl_addon_idx');
	//Hide "WPL → Hosting BenchMarker".
	remove_submenu_page('WPL_main_menu', 'wpl_benchmarker');
}

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

Where do I put this code?