revert: 恢复多框架编译

Author: ArgoZhang

src/BootstrapBlazor/Directory.Build.props

@@ -2,7 +2,6 @@
 
   <Import Project="..\Directory.Build.props" />
   <Import Project="..\Logo.props" />
-  <Import Project="..\..\Framework.props" />
   <Import Project="..\SourceLink.targets" />
 
   <PropertyGroup>
@@ -17,12 +16,7 @@
     <IsPackable>true</IsPackable>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(Configuration)' == 'Debug'">
-    <TargetFramework>$(RunTargetFramework)</TargetFramework>
-  </PropertyGroup>
-
-  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
-    <TargetFramework></TargetFramework>
+  <PropertyGroup>
     <TargetFrameworks>net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>