Remove duplicate assemblies from extension install. (#6508)

- These are already shipped by VS.

Fixes #6405

src/Razor/src/Microsoft.VisualStudio.RazorExtension/Microsoft.VisualStudio.RazorExtension.csproj

@@ -153,9 +153,7 @@
     <RazorNgendVSIXSourceItem Include="$(OutputPath)Microsoft.Extensions.Configuration.Binder.dll" />
     <RazorNgendVSIXSourceItem Include="$(OutputPath)Microsoft.Extensions.Logging.dll" />
     <RazorNgendVSIXSourceItem Include="$(OutputPath)Microsoft.Extensions.Logging.Abstractions.dll" />
-    <RazorNgendVSIXSourceItem Include="$(OutputPath)System.IO.Pipelines.dll" />
     <RazorNgendVSIXSourceItem Include="$(OutputPath)System.Reactive.dll" />
-    <RazorNgendVSIXSourceItem Include="$(OutputPath)System.Runtime.CompilerServices.Unsafe.dll" />
     <RazorNgendVSIXSourceItem Include="$(OutputPath)System.Threading.Channels.dll" />
 
     <VSIXSourceItem Include="$(OutputPath)Microsoft.VisualStudio.LanguageServer.Protocol.dll" />

src/Razor/src/Microsoft.VisualStudio.RazorExtension/source.extension.vsixmanifest

@@ -49,9 +49,7 @@
     <Asset Type="Microsoft.VisualStudio.Assembly" Path="Microsoft.Extensions.Configuration.Abstractions.dll" />
     <Asset Type="Microsoft.VisualStudio.Assembly" Path="Microsoft.Extensions.Logging.dll" />
     <Asset Type="Microsoft.VisualStudio.Assembly" Path="Microsoft.Extensions.Logging.Abstractions.dll" />
-    <Asset Type="Microsoft.VisualStudio.Assembly" Path="System.IO.Pipelines.dll" />
     <Asset Type="Microsoft.VisualStudio.Assembly" Path="System.Reactive.dll" />
-    <Asset Type="Microsoft.VisualStudio.Assembly" Path="System.Runtime.CompilerServices.Unsafe.dll" />
     <Asset Type="Microsoft.VisualStudio.Assembly" Path="System.Threading.Channels.dll" />
     <Asset Type="Microsoft.VisualStudio.Assembly" Path="Microsoft.AspNetCore.Razor.LanguageServer.dll" />
     <Asset Type="Microsoft.VisualStudio.Assembly" Path="Microsoft.AspNetCore.Razor.LanguageServer.Protocol.dll" />