Directory.Build.props: Remove default obj folder output

It caused problems with `dotnet try verify`, getting inconsistent results.
Also, we no longer need it as we no longer have multiple .csproj files
in the same folder.

Author: angularsen

Directory.Build.props

@@ -1,8 +1,7 @@
 <Project>
   <!-- This file will be implicitly linked by all projects in folder -folders -->
   <PropertyGroup>
-    <!-- Avoid sharing obj folder with multiple .csproj files in same folder -->
-    <BaseIntermediateOutputPath>$(MSBuildThisFileDirectory)obj/$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <!-- Default to output to Artifacts folder -->
     <OutputPath>$(MSBuildThisFileDirectory)Artifacts/$(MSBuildProjectName)</OutputPath>
   </PropertyGroup>