move layout to the framework.

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Blazor/App.razor

@@ -1,8 +1,8 @@
 @using Volo.Abp.Identity.Blazor
+@using Volo.Abp.AspNetCore.Components.WebAssembly.BasicTheme.Themes.Basic
 <CascadingAuthenticationState>
-    <Router 
-        AppAssembly="@typeof(Program).Assembly" 
-        AdditionalAssemblies="new []{ typeof(AbpIdentityBlazorModule).Assembly }">
+    <Router AppAssembly="@typeof(Program).Assembly"
+            AdditionalAssemblies="new []{ typeof(AbpIdentityBlazorModule).Assembly }">
         <Found Context="routeData">
             <AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)">
                 <NotAuthorized>

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.Blazor/_Imports.razor

@@ -7,6 +7,5 @@
 @using Microsoft.JSInterop
 @using Volo.Abp.AspNetCore.Components.WebAssembly
 @using MyCompanyName.MyProjectName.Blazor
-@using MyCompanyName.MyProjectName.Blazor.Shared
 @using Blazorise
 @using Blazorise.DataGrid