How to Hide the "Image Cleaner" Admin Menu

function plt_hide_adbear_image_cleaner_menus() {
	//Hide the "Image Cleaner" menu.
	remove_menu_page('adbear-image-cleaner');
}

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

Where do I put this code?