hide coupon notice in checkout

functions.php

@@ -185,3 +185,8 @@ add_filter( 'wc_stripe_upe_params', function ( $stripe_params ) {
   ];
   return $stripe_params;
 });
+
+add_action('woocommerce_before_checkout_form', 'remove_checkout_coupon_form', 9);
+function remove_checkout_coupon_form() {
+  remove_action('woocommerce_before_checkout_form', 'woocommerce_checkout_coupon_form', 10);
+}