Using code inside function.php
add_filter( 'woocommerce_product_tabs', 'wcs_woo_remove_reviews_tab', 98 ); function wcs_woo_remove_reviews_tab($tabs) { unset($tabs['reviews']); return $tabs; }
You can hide reviews tab by using css >> You need to paste the code inside theme custom css
.woocommerce_tabs .tabs { display: none; }