Remove the old language server (#12871)

Fixes #12491

There is still a few things we can clean up after this, but this makes
the Find All Refs results make a lot more sense.

I suspect commit-at-a-time makes the most sense for this one, but who
knows whether GitHub will do a good job of showing diffs.

Val build:
https://dev.azure.com/dnceng/internal/_build/results?buildId=2919555&view=results
Test insertion:
https://dev.azure.com/devdiv/DevDiv/_git/VS/pullrequest/715049

Author: davidwengier

Razor.Slim.slnf

@@ -24,9 +24,7 @@
       "src\\Razor\\src\\Microsoft.VisualStudio.LanguageServices.Razor\\Microsoft.VisualStudio.LanguageServices.Razor.csproj",
       "src\\Razor\\src\\Microsoft.VisualStudio.RazorExtension\\Microsoft.VisualStudio.RazorExtension.csproj",
       "src\\Razor\\src\\Microsoft.VisualStudioCode.RazorExtension\\Microsoft.VisualStudioCode.RazorExtension.csproj",
-      "src\\Razor\\src\\Microsoft.AspNetCore.Razor.LanguageServer\\Microsoft.AspNetCore.Razor.LanguageServer.csproj",
       "src\\Razor\\test\\Microsoft.AspNetCore.Razor.Test.Common.Tooling\\Microsoft.AspNetCore.Razor.Test.Common.Tooling.csproj",
-      "src\\Razor\\test\\Microsoft.AspNetCore.Razor.LanguageServer.Test\\Microsoft.AspNetCore.Razor.LanguageServer.Test.csproj",
       "src\\Razor\\test\\Microsoft.CodeAnalysis.Razor.Workspaces.Test\\Microsoft.CodeAnalysis.Razor.Workspaces.Test.csproj",
       "src\\Razor\\test\\Microsoft.CodeAnalysis.Remote.Razor.Test\\Microsoft.CodeAnalysis.Remote.Razor.Test.csproj",
       "src\\Razor\\test\\Microsoft.VisualStudio.LanguageServer.ContainedLanguage.Test\\Microsoft.VisualStudio.LanguageServer.ContainedLanguage.Test.csproj",

Razor.slnx

@@ -59,7 +59,7 @@
     <Project Path="src/Shared/Microsoft.AspNetCore.Razor.Utilities.Shared/Microsoft.AspNetCore.Razor.Utilities.Shared.csproj" />
   </Folder>
   <Folder Name="/Tooling Tests/">
-    <Project Path="src/Razor/test/Microsoft.AspNetCore.Razor.LanguageServer.Test/Microsoft.AspNetCore.Razor.LanguageServer.Test.csproj" />
+    <Project Path="src/Razor/test/Microsoft.CodeAnalysis.Razor.CohostingShared.Test/Microsoft.CodeAnalysis.Razor.CohostingShared.Test.shproj" Id="4369f151-7b14-4973-ada4-ba6b8e26f847" />
     <Project Path="src/Razor/test/Microsoft.AspNetCore.Razor.Test.Common.Cohosting/Microsoft.AspNetCore.Razor.Test.Common.Cohosting.csproj" />
     <Project Path="src/Razor/test/Microsoft.AspNetCore.Razor.Test.Common.Tooling/Microsoft.AspNetCore.Razor.Test.Common.Tooling.csproj" />
     <Project Path="src/Razor/test/Microsoft.CodeAnalysis.Razor.Workspaces.Test/Microsoft.CodeAnalysis.Razor.Workspaces.Test.csproj" />
@@ -72,7 +72,6 @@
   </Folder>
   <Folder Name="/Tooling/">
     <File Path="src/Razor/src/Directory.Build.props" />
-    <Project Path="src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/Microsoft.AspNetCore.Razor.LanguageServer.csproj" />
     <Project Path="src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Microsoft.CodeAnalysis.Razor.CohostingShared.shproj" />
     <Project Path="src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Microsoft.CodeAnalysis.Razor.Workspaces.csproj" />
     <Project Path="src/Razor/src/Microsoft.CodeAnalysis.Remote.Razor.CoreComponents/arm64/Microsoft.CodeAnalysis.Remote.Razor.CoreComponents.arm64.csproj" />

eng/Publishing.props

@@ -19,11 +19,6 @@
 
   <Target Name="_UpdatePublishItems">
     <!-- This target is defined in eng/targets/Packaging.targets and included in every project. -->
-    <MSBuild Projects="$(RepoRoot)src\Razor\src\Microsoft.AspNetCore.Razor.LanguageServer\Microsoft.AspNetCore.Razor.LanguageServer.csproj"
-        Targets="_GetPackageVersionInfo"
-        SkipNonexistentProjects="false">
-      <Output TaskParameter="TargetOutputs" ItemName="_ResolvedPackageVersionInfo" />
-    </MSBuild>
 
     <PropertyGroup>
       <_PackageVersion>@(_ResolvedPackageVersionInfo->'%(PackageVersion)')</_PackageVersion>

src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Microsoft.CodeAnalysis.Razor.Compiler.csproj

@@ -43,8 +43,6 @@
     <InternalsVisibleTo Include="Microsoft.AspNetCore.Mvc.Razor.Extensions.Version2_X.Test" Key="$(RazorKey)" />
     <InternalsVisibleTo Include="Microsoft.AspNetCore.Razor.Language.Legacy.Test" Key="$(RazorKey)" />
     <InternalsVisibleTo Include="Microsoft.AspNetCore.Razor.Language.Test" Key="$(RazorKey)" />
-    <InternalsVisibleTo Include="Microsoft.AspNetCore.Razor.LanguageServer" Key="$(RazorKey)" />
-    <InternalsVisibleTo Include="Microsoft.AspNetCore.Razor.LanguageServer.Test" Key="$(RazorKey)" />
     <InternalsVisibleTo Include="Microsoft.AspNetCore.Razor.Microbenchmarks" Key="$(RazorKey)" />
     <InternalsVisibleTo Include="Microsoft.AspNetCore.Razor.Microbenchmarks.Compiler" Key="$(RazorKey)" />
     <InternalsVisibleTo Include="Microsoft.AspNetCore.Razor.Test.Common" Key="$(RazorKey)" />