Merge branch 'feature-dgy-辅助工具机具解绑取消30天限制' into feature-dgy-后台测试

Areas/Admin/Controllers/MainServer/SysToolsController.cs

@@ -2697,7 +2697,7 @@ namespace MySystem.Areas.Admin.Controllers
             });
             pos.BindMerchantId = 0;
             pos.BindingState = 0;
-            pos.BindingTime = DateTime.Parse("1900-01-01");
+            pos.BindingTime = null;
             pos.UserId = pos.BuyUserId;
             string IdBrand = pos.BuyUserId + "_" + pos.BrandId;
             db.SaveChanges();