How to Hide the "Fatal Plugin Log" Admin Menu

function plt_hide_fatal_plugin_auto_deactivator_menus() {
	//Hide the "Tools → Fatal Plugin Log" menu.
	remove_submenu_page('tools.php', 'fpad-log');
}

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

Where do I put this code?