Revert "Enable repackaging of NETStandard 2.1 Targeting Pack (dotnet#101518)"

This reverts commit c67a2e4.

Author: MichaelSimons

eng/Subsets.props

@@ -507,7 +507,6 @@
         <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' != 'Mono' and '$(PgoInstrument)' != 'true'" Include="$(InstallerProjectRoot)pkg\sfx\Microsoft.NETCore.App\Microsoft.NETCore.App.Crossgen2.sfxproj" />
         <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\sfx\installers\dotnet-host.proj" />
         <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\sfx\installers\dotnet-hostfxr.proj" />
-        <SharedFrameworkProjectToBuild Condition="'$(BuildNETStandard21TargetingPack)' == 'true' and '$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\sfx\installers\netstandard2.1.proj" />
         <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\sfx\installers\dotnet-runtime-deps\*.proj" />
         <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\archives\dotnet-nethost.proj" />
         <SharedFrameworkProjectToBuild Condition="'$(MonoCrossAOTTargetOS)' != ''" Include="$(InstallerProjectRoot)pkg\sfx\Microsoft.NETCore.App\monocrossaot.sfxproj" Pack="true" />

eng/Versions.props

@@ -260,12 +260,4 @@
     <MicrosoftDotnetSdkInternalVersion>8.0.101</MicrosoftDotnetSdkInternalVersion>
     <SdkVersionForWorkloadTesting>$(MicrosoftDotnetSdkInternalVersion)</SdkVersionForWorkloadTesting>
   </PropertyGroup>
-  <PropertyGroup>
-    <!--
-      Targeting pack package for NETStandard 2.1 gets rebuilt on demand.
-
-      Set to rebuild with 8.0.6 release, and automatically disabled after that.
-    -->
-    <BuildNETStandard21TargetingPack Condition="'$(PatchVersion)' == '6'">true</BuildNETStandard21TargetingPack>
-  </PropertyGroup>
 </Project>

src/installer/pkg/sfx/installers.proj

@@ -22,10 +22,6 @@
     <InstallerProjectReference Include="installers/dotnet-runtime-deps/dotnet-runtime-deps-sles.12.proj" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(BuildNETStandard21TargetingPack)' == 'true' and '$(BuildRpmPackage)' == 'true'">
-    <InstallerProjectReference Include="installers/netstandard2.1.proj" />
-  </ItemGroup>
-
   <Target Name="BuildInstallerProjects" BeforeTargets="Build">
     <MSBuild Projects="@(InstallerProjectReference)"
              Targets="GenerateInstallers"