How to Hide the "Intl Tel Input" Admin Menu

function plt_hide_international_telephone_input_with_flags_and_dial_codes_menus() {
	//Hide the "Intl Tel Input" menu.
	remove_menu_page('international-telephone-input-with-flags-and-dial-codes');
}

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

Where do I put this code?