How to Hide the "SSP Stacktable" Admin Menu

function plt_hide_ssp_stacktable_tables_menus() {
	//Hide the "SSP Stacktable" menu.
	remove_menu_page('ssp_stacktable_options');
}

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

Where do I put this code?