How to Hide the "Myvideo.Ge Options" Admin Menu

function plt_hide_myvideoge_plugin_menus() {
	//Hide the "Settings → Myvideo.Ge Options" menu.
	remove_submenu_page('options-general.php', 'myvideo_options');
}

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

Where do I put this code?