Cleanup code

build/BuildScript.Util.cs

 using System;
-using System.Collections.Generic;
-using System.Text;
 
 namespace BuildScript
 {

build/BuildScript.Version.cs

 using System;
-using System.Collections.Generic;
-using System.Text;
 using System.Xml;
 using FlubuCore.Context;
 using FlubuCore.Scripting.Attributes;

build/BuildScript.cs

 using System;
 using System.Collections.Generic;
-using System.Linq;
 using FlubuCore.Context;
 using FlubuCore.IO;
 using FlubuCore.Scripting;
 using FlubuCore.Scripting.Attributes;
-using GlobExpressions;
 
 namespace BuildScript
 {

build/BuildScript.csproj

@@ -4,6 +4,10 @@
     <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Remove="version.props" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="FlubuCore" Version="4.3.5" />
   </ItemGroup>

build/BuildVersion.cs

-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace BuildScript
+namespace BuildScript
 {
     public class BuildVersion
     {