How to Hide wptools Admin Menus

function plt_hide_wptools_menus() {
	//Hide "Plugins → MU Plugins".
	remove_submenu_page('plugins.php', 'mu-plugins');

	//Hide "WP Tools".
	remove_menu_page('wp-tools');
	//Hide "WP Tools → Dashboard".
	remove_submenu_page('wp-tools', 'wp-tools');
	//Hide "WP Tools → Settings".
	remove_submenu_page('wp-tools', 'settings-wptools');
	//Hide "WP Tools → Check mySQL Tables".
	remove_submenu_page('wp-tools', 'wptools_options23');
	//Hide "WP Tools → Database Detais".
	remove_submenu_page('wp-tools', 'wptools_options32');
	//Hide "WP Tools → Server Benchmark".
	remove_submenu_page('wp-tools', 'wptools_options30');
	//Hide "WP Tools → Javascrip and jQuery".
	remove_submenu_page('wp-tools', 'wptools_options35');
	//Hide "WP Tools → Show Cookies".
	remove_submenu_page('wp-tools', 'wptools_options28');
	//Hide "WP Tools → Show File Permissions".
	remove_submenu_page('wp-tools', 'wptools_options29');
	//Hide "WP Tools → Show Cron Jobs".
	remove_submenu_page('wp-tools', 'wptools_options27');
	//Hide "WP Tools → Show wp-config.php".
	remove_submenu_page('wp-tools', 'wptools_options26');
	//Hide "WP Tools → Show .htaccess".
	remove_submenu_page('wp-tools', 'wptools_options25');
	//Hide "WP Tools → Show PHP Info".
	remove_submenu_page('wp-tools', 'wptools_options22');
	//Hide "WP Tools → Show Errors".
	remove_submenu_page('wp-tools', 'wptools_options21');
	//Hide "WP Tools →".
	remove_submenu_page('wp-tools', 'wptools_options31');
	//Hide "WP Tools → Erase .maintenance file".
	remove_submenu_page('wp-tools', 'wptools_options40');
	//Hide "WP Tools → Edit robots txt".
	remove_submenu_page('wp-tools', 'wptools_options24');
	//Hide "WP Tools → Show Transients".
	remove_submenu_page('wp-tools', 'wptools_options33');
	//Hide "WP Tools → More New Tools".
	remove_submenu_page('wp-tools', 'wptools_options39');
	//Hide "WP Tools → Go Pro".
	remove_submenu_page('wp-tools', 'wptools_my-custom-submenu-page9');
}

add_action('admin_menu', 'plt_hide_wptools_menus', 100);
Where do I put this code?