[Setup] Prerequisites: remove unused vs_buildtools.exe

sources/prerequisites/BuildTools2019/vs_buildtools.exe

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:23664c1f1d7cd86f6804c4840221a60952a9f2ef6540eb195d6da732f0e703e0
-size 1330776

sources/tools/Stride.PackageInstall/Program.cs

@@ -11,8 +11,6 @@ using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using System.Windows.Forms;
-using Microsoft.Win32;
-using Stride.Core.VisualStudio;
 
 namespace Stride.PackageInstall
 {

sources/tools/Stride.PackageInstall/Stride.PackageInstall.csproj

@@ -23,19 +23,10 @@
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <Reference Include="System.Windows.Forms" />
   </ItemGroup>
-  <ItemGroup>
-    <Compile Include="..\..\core\Stride.Core.Design\VisualStudio\VisualStudioVersions.cs">
-      <Link>VisualStudioVersions.cs</Link>
-    </Compile>
-  </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="..\..\prerequisites\BuildTools2019\vs_buildtools.exe">
-      <Link>vs_buildtools.exe</Link>
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
     <None Include="..\..\prerequisites\install-prerequisites.exe" Condition="Exists('..\..\prerequisites\install-prerequisites.exe')">
       <Link>install-prerequisites.exe</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>