WooCommerce - Additional Information tab

function.php

<?php
//Hide dimensions in Additional Information tab

add_filter( 'wc_product_enable_dimensions_display', '__return_false' );

//Hide Additional Information tab

function custom_woocommerce_product_tabs( $tabs ) {
   if ( isset( $tabs['additional_information'] ) ) {
      unset( $tabs['additional_information'] );
   }
   return $tabs;
}

add_filter( 'woocommerce_product_tabs', 'custom_woocommerce_product_tabs' );