How to Hide Advanced Country Blocker Admin Menus

function plt_hide_advanced_country_blocker_menus() {
	//Hide the "Country Blocker" menu.
	remove_menu_page('advcb_settings');
	//Hide the "Country Blocker → Country Blocker" menu.
	remove_submenu_page('advcb_settings', 'advcb_settings');
	//Hide the "Country Blocker → Block Logs" menu.
	remove_submenu_page('advcb_settings', 'advcb_block_logs');
}

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

Where do I put this code?