Remove the version.txt file from packages (#10692)

The version.txt file isn't used anymore. It isn't read by windowsdesktop, sdk or wpf. Though, it's showing up as a difference between the MSFT and the VMR build. Remove it to simplify the infrastructure and reduce the package assets.

Author: ViktorHofer

eng/WpfArcadeSdk/tools/Packaging.targets

@@ -406,33 +406,6 @@ $(PreparePackageAssetsDependsOn):
     </PropertyGroup>
   </Target>
 
-  <!-- Create version.txt containing latest commit ID -->
-  <Target Name="GenerateVersionFileWithRepositoryCommit"
-          Condition="'$(IsPackable)'=='true' and '$(CreateArchNeutralPackage)'=='true' and !Exists('$(ArtifactsPackagingDir)$(NormalizedPackageName)\version.txt')"
-          BeforeTargets="CreateContentFolder"
-          Outputs="$(ArtifactsPackagingDir)$(NormalizedPackageName)\version.txt">
-    <!--
-      Workaround
-        Ensure that SourceRevisionId is obtained if it has not already been read in
-        Reuse tasks from Microsoft.Build.Tasks.Git.targets
-    -->
-    <Microsoft.Build.Tasks.Git.LocateRepository Path="$(MSBuildProjectDirectory)" Condition="'$(SourceRevisionId)' == ''" >
-      <Output TaskParameter="RevisionId" PropertyName="SourceRevisionId" />
-    </Microsoft.Build.Tasks.Git.LocateRepository>
-    <ItemGroup>
-      <RepoCommitVersionFileLines Remove="@(RepoCommitVersionFileLines)" />
-      <RepoCommitVersionFileLines Include="$(SourceRevisionId)" />
-    </ItemGroup>
-
-    <PropertyGroup>
-      <RepoCommitVersionFileDir>$(ArtifactsPackagingDir)$(NormalizedPackageName)\</RepoCommitVersionFileDir>
-      <RepoCommitVersionFile>$(RepoCommitVersionFileDir)version.txt</RepoCommitVersionFile>
-    </PropertyGroup>
-
-    <MakeDir Condition="!Exists('$(RepoCommitVersionFileDir)')" Directories="$(RepoCommitVersionFileDir)" />
-    <WriteLinesToFile Lines="@(RepoCommitVersionFileLines)" File="$(RepoCommitVersionFile)"/>
-  </Target>
-
   <!--  Generate runtime.json for embedding in the arch-neutral package that uses the Bait & Switch technique -->
   <Target Name="GenerateRuntimeJson"
           Condition="'$(IsPackable)'=='true' and '$(CreateArchNeutralPackage)'=='true' and '$(PlatformIndependentPackage)'!='true'"