Delete infra changes from dotnet#48527

Author: Prashanth Govindarajan

eng/testing/linker/project.csproj.template

@@ -29,7 +29,6 @@
 
   <ItemGroup>
     {AdditionalProjectReferences}
-    {TrimmerRootAssemblies}
   </ItemGroup>
 
   <!-- Logic to override the default IlLink tasks that come from the SDK and use the one

eng/testing/linker/trimmingTests.targets

@@ -66,11 +66,6 @@
       <_additionalProjectSourceFiles Include="%(TestConsoleApps.AdditionalSourceFiles)" />
     </ItemGroup>
 
-    <PropertyGroup>
-      <_TrimmerRootAssemblies>%(TestConsoleApps.TrimmerRootAssemblies)</_TrimmerRootAssemblies>
-      <_TrimmerRootAssemblies Condition="'$(_TrimmerRootAssemblies)' != ''">&lt;TrimmerRootAssembly Include=&quot;$(_TrimmerRootAssemblies)&quot; /&gt;</_TrimmerRootAssemblies>
-    </PropertyGroup>
-
     <MakeDir Directories="$(_projectDir)" />
     <WriteLinesToFile File="$(_projectFile)"
                       Lines="$([System.IO.File]::ReadAllText('$(ProjectTemplate)')
@@ -82,7 +77,6 @@
                                                  .Replace('{MicrosoftNETILLinkTasksVersion}', '$(MicrosoftNETILLinkTasksVersion)')
                                                  .Replace('{ExtraTrimmerArgs}', '%(TestConsoleApps.ExtraTrimmerArgs)')
                                                  .Replace('{AdditionalProjectReferences}', '$(_additionalProjectReferencesString)')
-                                                 .Replace('{TrimmerRootAssemblies}', '$(_TrimmerRootAssemblies)')
                                                  .Replace('{RepositoryEngineeringDir}', '$(RepositoryEngineeringDir)')
                                                  .Replace('{MonoAOTCompilerDir}', '$(MonoAOTCompilerDir)')
                                                  .Replace('{MonoProjectRoot}', '$(MonoProjectRoot)')

src/libraries/System.ComponentModel.TypeConverter/tests/TrimmingTests/System.ComponentModel.TypeConverter.TrimmingTests.proj

@@ -1,12 +1,6 @@
 <Project DefaultTargets="Build">
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props))" />
 
-  <ItemGroup>
-    <TestConsoleAppSourceFiles Include="ComObjectTypeTest.cs" />
-    <TestConsoleAppSourceFiles Include="InterfaceTypeTest.cs" />
-    <TestConsoleAppSourceFiles Include="TypeConverterIsReadOnly.cs" />
-    <TestConsoleAppSourceFiles Include="TypeConverterTest.cs" />
-  </ItemGroup>
 
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.targets))" />
 </Project>