Use toolset version from Arcade (#36754)

.editorconfig

@@ -37,7 +37,7 @@ indent_size = 2
 
 # Dotnet diagnostic settings
 [*.{cs,vb}]
-dotnet_diagnostic.xUnit2018.severity = suppress # "do not compare an object's exact type to the abstract class" is a valid assert, but very noisy right now
+dotnet_diagnostic.xUnit2018.severity = none # "do not compare an object's exact type to the abstract class" is a valid assert, but very noisy right now
 
 # Dotnet code style settings:
 [*.{cs,vb}]

eng/Versions.props

@@ -72,7 +72,6 @@
     <MicrosoftInternalVisualStudioShellInterop140DesignTimeVersion>14.3.25407-alpha</MicrosoftInternalVisualStudioShellInterop140DesignTimeVersion>
     <MicrosoftMetadataVisualizerVersion>1.0.0-beta1-63011-01</MicrosoftMetadataVisualizerVersion>
     <MicrosoftMSXMLVersion>8.0.0.0-alpha</MicrosoftMSXMLVersion>
-    <MicrosoftNetCompilersToolsetVersion>3.2.0-beta4-19312-15</MicrosoftNetCompilersToolsetVersion>
     <MicrosoftNetCoreAnalyzersVersion>$(RoslynDiagnosticsNugetPackageVersion)</MicrosoftNetCoreAnalyzersVersion>
     <MicrosoftNetCoreILAsmVersion>3.0.0-preview6-27721-71</MicrosoftNetCoreILAsmVersion>
     <MicrosoftNetCoreILDasmVersion>3.0.0-preview6-27721-71</MicrosoftNetCoreILDasmVersion>