Minor cleanup changes (Azure#191)

Author: daxian-dbw

build.ps1

@@ -115,7 +115,7 @@ if($Test.IsPresent) {
     try {
         # Update the help and diff the result.
         $docsPath = Join-Path $PSScriptRoot docs cmdlets
-        Update-MarkdownHelp -Path $docsPath
+        $null = Update-MarkdownHelp -Path $docsPath
         $diff = git diff $docsPath
         if ($diff) {
             throw "Cmdlet help docs are not up-to-date, run Update-MarkdownHelp.`n$diff`n"

test/Unit/Microsoft.Azure.Functions.PowerShellWorker.Test.csproj

@@ -2,15 +2,13 @@
   <Import Project="..\..\PowerShellWorker.Common.props" />
   <PropertyGroup>
     <TargetFramework>netcoreapp2.2</TargetFramework>
-
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" />
     <PackageReference Include="xunit" Version="2.3.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
-    <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" />
     <PackageReference Include="Microsoft.PowerShell.SDK" Version="6.2.0" />
   </ItemGroup>