How to Hide WP Email Users Admin Menus

function plt_hide_wp_email_users_menus() {
	//Hide "WP Email Users".
	remove_menu_page('weu-admin-page');
	//Hide "WP Email Users → Send Email".
	remove_submenu_page('weu-admin-page', 'weu_send_email');
	//Hide "WP Email Users → Template Manager".
	remove_submenu_page('weu-admin-page', 'weu-template');
	//Hide "WP Email Users → SMTP Configuration".
	remove_submenu_page('weu-admin-page', 'weu-smtp-config');
	//Hide "WP Email Users → Send Autoresponder Email".
	remove_submenu_page('weu-admin-page', 'weu_email_setting');
	//Hide "WP Email Users → Settings".
	remove_submenu_page('weu-admin-page', 'weu_email_auto_config');
	//Hide "WP Email Users → List Manager".
	remove_submenu_page('weu-admin-page', 'weu-manage-list');
	//Hide "WP Email Users → Add Custom Roles".
	remove_submenu_page('weu-admin-page', 'weu_custom_role');
	//Hide "WP Email Users → Sent Emails".
	remove_submenu_page('weu-admin-page', 'weu_sent_emails');
}

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

Where do I put this code?