refactor(pricing): 移除冗余的产品属性键缓存逻辑

- 删除了产品属性键的缓存处理逻辑
- 简化了价格计算服务中的商品处理流程
- 移除了不再使用的产品属性键设置方法调用

src/main/java/com/ycwl/basic/pricing/service/impl/PriceCalculationServiceImpl.java

@@ -196,13 +196,6 @@ public class PriceCalculationServiceImpl implements IPriceCalculationService {
             BigDecimal subtotal = priceInfo.getActualPrice().multiply(BigDecimal.valueOf(product.getPurchaseCount()));
             BigDecimal originalSubtotal = priceInfo.getOriginalPrice().multiply(BigDecimal.valueOf(product.getPurchaseCount()));
 
-            List<String> attributeKeys = attributeKeysCache.get(productTypeCode);
-            if (attributeKeys == null) {
-                attributeKeys = buildProductAttributeKeys(capability);
-                attributeKeysCache.put(productTypeCode, attributeKeys);
-            }
-            product.setAttributeKeys(attributeKeys);
-
             product.setSubtotal(subtotal);
 
             totalAmount = totalAmount.add(subtotal);