Clean test data from SQL sample database.

Author: AbelCheng

TaskParallelFoundation/ConsoleTest/SampleDatabase/SqlServer/TaskParallelWorkflow.mdf

@@ -106,9 +106,7 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="Configs\" />
-  </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.