Remove System.Threading.AccessControl package reference

Author: ericstj

eng/Versions.props

@@ -94,7 +94,6 @@
     <SystemSecurityCryptographyOpenSslVersion>5.0.0</SystemSecurityCryptographyOpenSslVersion>
     <SystemSecurityPrincipalWindowsVersion>5.0.0</SystemSecurityPrincipalWindowsVersion>
     <SystemSecurityPermissionsVersion>7.0.0</SystemSecurityPermissionsVersion>
-    <SystemThreadingAccessControlVersion>7.0.0</SystemThreadingAccessControlVersion>
     <!-- Keep toolset versions in sync with dotnet/msbuild and dotnet/sdk -->
     <MicrosoftBclAsyncInterfacesToolsetVersion>8.0.0</MicrosoftBclAsyncInterfacesToolsetVersion>
     <MicrosoftIoRedistToolsetVersion>6.0.1</MicrosoftIoRedistToolsetVersion>

src/tools/illink/test/Mono.Linker.Tests/Mono.Linker.Tests.csproj

@@ -10,11 +10,6 @@
     <PackageReference Include="Microsoft.DotNet.Cecil" Version="$(MicrosoftDotNetCecilVersion)" PrivateAssets="All" Publish="True" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="$(MicrosoftCodeAnalysisVersion)" />
     <ProjectReference Include="$(RepoRoot)\src\coreclr\tools\ILVerification\ILVerification.csproj" />
-    <!-- This reference is purely so that the ILLink can resolve this
-         dependency of mscorlib. It is not actually required to build
-         the tests. -->
-    <PackageReference Include="System.Threading.AccessControl" Version="$(SystemThreadingAccessControlVersion)" />
-
     <ProjectReference Include="..\..\src\linker\Mono.Linker.csproj" SkipUseReferenceAssembly="true" />
     <ProjectReference Include="..\Mono.Linker.Tests.Cases\**\*.csproj" />
     <ProjectReference Include="..\Mono.Linker.Tests.Cases.Expectations\Mono.Linker.Tests.Cases.Expectations.csproj" />