Product Image Gallery: fix 404 error

src/BlockTypes/ProductImageGallery.php

@@ -1,9 +1,6 @@
 <?php
 namespace Automattic\WooCommerce\Blocks\BlockTypes;
 
-use Automattic\WooCommerce\Blocks\Utils\StyleAttributesUtils;
-
-
 /**
  * ProductImageGallery class.
  */
@@ -15,6 +12,13 @@ class ProductImageGallery extends AbstractBlock {
 	 */
 	protected $block_name = 'product-image-gallery';
 
+	/**
+	 * It isn't necessary register block assets because it is a server side block.
+	 */
+	protected function register_block_type_assets() {
+		return null;
+	}
+
 	/**
 	 *  Register the context
 	 *