The Zoom functionality of Woocommece hides that feature of the browsers. That is not related to our theme and a Woocommerce functionality. You can check the original Woocommerce demo which does not have the alt tooltip either:
To disable the Zoom feature, you need to simply add the code below to functions.php file of the Child Theme which you need to install.
remove_theme_support( 'wc-product-gallery-zoom' );