⚡ 优化代码，删除无用引入和错误注解@NotBlank

pigx-visual/pigx-pay/src/main/java/com/pig4cloud/pigx/pay/service/impl/PayGoodsOrderServiceImpl.java

@@ -61,6 +61,7 @@ public class PayGoodsOrderServiceImpl extends ServiceImpl<PayGoodsOrderMapper, P
 	@Override
 	@Transactional(rollbackFor = Exception.class)
 	public R buy(Long amount) {
+		return null;
 	}
 
 }