Fix CI

Author: HaoK

src/Identity/UI/src/build/Microsoft.AspNetCore.Identity.UI.targets

@@ -1,24 +1,3 @@
 <Project>
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.AspNetCore.StaticWebAssets.targets"/>
-
-  <Target Name="ValidateIdentityUIFrameworkVersion" BeforeTargets="Build">
-
-    <PropertyGroup>
-      <_IdentityUIUnknownVersionErrorMessage>
-        The 'IdentityUIFrameworkVersion' '$(IdentityUIFrameworkVersion)' in '$(MSBuildProjectFile)' is not valid. Valid versions are 'Bootstrap4' and 'Bootstrap5'.
-      </_IdentityUIUnknownVersionErrorMessage>
-    </PropertyGroup>
-
-    <ItemGroup>
-      <_IdentityUIActiveWarnings Include="IdentityUI002" Exclude="$(NoWarn)" />
-    </ItemGroup>
-
-    <Error
-           Code="IdentityUI002"
-           Text="$(_IdentityUIUnknownVersionErrorMessage)"
-           File="@(MSBuildThisProjectFile)"
-           Condition="'$(IdentityUIFrameworkVersion)' != 'Bootstrap4' and '%(_IdentityUIActiveWarnings.Identity)' == 'IdentityUI002'" />
-
-  </Target>
-
 </Project>