去除VS中文件夹显示红色'x' (#506)

上面的配置已包含这些文件夹，删掉重复配置

DotNet/Core/DotNet.Core.csproj

@@ -39,9 +39,5 @@
       <ProjectReference Include="..\..\Share\Share.SourceGenerator\Share.SourceGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
       <ProjectReference Include="..\ThirdParty\DotNet.ThirdParty.csproj" />
     </ItemGroup>
-    
-    <ItemGroup>
-      <Folder Include="Core\Serialize\" />
-    </ItemGroup>
 
 </Project>

DotNet/Hotfix/DotNet.Hotfix.csproj

@@ -41,8 +41,5 @@
         <ProjectReference Include="..\Loader\DotNet.Loader.csproj" />
         <ProjectReference Include="..\Model\DotNet.Model.csproj" />
     </ItemGroup>
-    <ItemGroup>
-      <Folder Include="Client\LockStep\" />
-    </ItemGroup>
 
 </Project>

DotNet/Model/DotNet.Model.csproj

@@ -48,7 +48,4 @@
         <ProjectReference Include="..\Core\DotNet.Core.csproj" />
         <ProjectReference Include="..\ThirdParty\DotNet.ThirdParty.csproj" />
     </ItemGroup> 
-    <ItemGroup>
-      <Folder Include="Client\LockStep\" />
-    </ItemGroup>
 </Project>