Update Microsoft.Identity.Client.csproj to remove unwanted files (#5156)

Update Microsoft.Identity.Client.csproj

Author: trwalke

src/client/Microsoft.Identity.Client/Microsoft.Identity.Client.csproj

@@ -80,7 +80,6 @@
     <Compile Include="$(PathToMsalSources)\**\*.cs" Exclude="$(PathToMsalSources)\obj\**\*.*" />
     <Compile Remove="$(PathToMsalSources)\Platforms\**\*.*;$(PathToMsalSources)\Resources\*.cs" />
     <Compile Remove="$(PathToMsalSources)\PlatformsCommon\PlatformNotSupported\ApiConfig\SystemWebViewOptions.cs" />
-    <None Remove="Extensibility\RP\ConfidentialClientApplicationBuilderForResourceProviders.cs" />
     <EmbeddedResource Include="$(PathToMsalSources)\Properties\Microsoft.Identity.Client.rd.xml" />
     <None Include="$(PathToMsalSources)\..\..\..\README.md" Pack="true" PackagePath="\" />
     <None Include="Platforms\net\JsonObjectAttribute.cs" />
@@ -164,8 +163,4 @@
     <AdditionalFiles Include="PublicAPI/$(TargetFramework)/PublicAPI.Shipped.txt" />
     <AdditionalFiles Include="PublicAPI/$(TargetFramework)/PublicAPI.Unshipped.txt" />
   </ItemGroup>
-
-  <ItemGroup>
-    <Compile Include="Extensibility\RP\ConfidentialClientApplicationBuilderForResourceProviders.cs" />
-  </ItemGroup>
 </Project>