Stop overriding a couple Arcade default package versions (#66095)

Author: wtgodbe

eng/Versions.props

@@ -98,17 +98,6 @@
     <!-- Partner teams -->
     <MicrosoftAzureSignalRVersion>1.2.0</MicrosoftAzureSignalRVersion>
     <MicrosoftBuildLocatorVersion>1.2.6</MicrosoftBuildLocatorVersion>
-    <!--
-      Temporarily override the Microsoft.NET.Test.Sdk version Arcade defaults to. That's incompatible w/ test
-      framework in current .NET SDKs.
-    -->
-    <MicrosoftNETTestSdkVersion>17.1.0-preview-20211109-03</MicrosoftNETTestSdkVersion>
-    <!--
-      Also use a newer, publicly-released version of the templating engine than the Arcade default.
-      https://github.com/dotnet/templating/blob/main/docs/Localization.md recommends updating the version when
-      preview or stable versions are released to NuGet.org.
-    -->
-    <MicrosoftTemplateEngineAuthoringTasksVersion>8.0.100-alpha.1.22607.1</MicrosoftTemplateEngineAuthoringTasksVersion>
     <!--
       Versions of Microsoft.CodeAnalysis packages referenced by analyzers shipped in the SDK.
       This need to be pinned since they're used in 3.1 apps and need to be loadable in VS 2019.