Hi Jesse,
Are you using a plugin to add the QR code functionality to the products? If so, it would be best to check on the plugin’s resource on how to remove the tab.
Here are also some options that you can do:
Install and active the child theme then login through FTP then go to wp-content/themes/x-child add add this code to the functions.php file:
/**
* Remove product data tabs
*/
add_filter( 'woocommerce_product_tabs', 'woo_remove_product_tabs', 98 );
function woo_remove_product_tabs( $tabs ) {
unset( $tabs['qr_code_tab'] ); // Remove the additional information tab
return $tabs;
}
.x-nav-tabs.four-up>li.qr_code_tab_tab {
display: none;
}
.x-nav-tabs.four-up>li {
width: 33.33339%;
}
Here are some related links about the suggestions above for further reading:
Hope this helps.