Remove duplicate NullEmailSender replacement.

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Application/MyProjectNameApplicationModule.cs

@@ -1,8 +1,5 @@
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.DependencyInjection.Extensions;
-using Volo.Abp.Account;
+using Volo.Abp.Account;
 using Volo.Abp.AutoMapper;
-using Volo.Abp.Emailing;
 using Volo.Abp.FeatureManagement;
 using Volo.Abp.Identity;
 using Volo.Abp.Modularity;
@@ -28,10 +25,6 @@ namespace MyCompanyName.MyProjectName
             {
                 options.AddMaps<MyProjectNameApplicationModule>();
             });
-
-#if DEBUG
-            context.Services.Replace(ServiceDescriptor.Singleton<IEmailSender, NullEmailSender>());
-#endif
         }
     }
 }