Paket/C#: Only pull in the tool restore targt via `InitialTargets`.

csharp/before.CSharp.sln.targets

@@ -1,5 +1,5 @@
 <Project InitialTargets="LocalToolRestore">
-  <Target Name="LocalToolRestore" BeforeTargets="PaketRestore">
+  <Target Name="LocalToolRestore">
     <Message Text="Restoring tools" Importance="High" />
     <Exec Command="dotnet tool restore" />
   </Target>