修改删除商品提示

app/Admin/Controllers/ProductSkuController.php

@@ -143,9 +143,12 @@ class ProductSkuController extends AdminController
     public function destroy($id)
     {
         $sku = ProductSkuModel::findOrFail($id);
-        if ($sku->release_at || $sku->verify_state == 1 || $sku->sales > 0) {//如果是上架中、审核中或者已售出的，无法删除
+        if ($sku->release_at || $sku->verify_state == 1) {//如果是上架中、审核中或者已售出的，无法删除
             throw new BizException(__('product-sku.options.deny_message'));
         }
+        if ($sku->sales > 0){
+            throw new BizException('商品已售出，无法被删除');
+        }
         return parent::destroy($id);
     }