remove duplicate package reference on Akka.FSharp

Author: Aaronontheweb

src/core/Akka.FSharp/Akka.FSharp.fsproj

@@ -21,7 +21,6 @@
     <ItemGroup>
         <PackageReference Include="FSharp.Quotations.Evaluator" Version="2.1.0"/>
         <PackageReference Include="FsPickler" Version="5.3.2"/>
-        <PackageReference Include="FSharp.Core" Version="$(FSharpVersion)"/>
     </ItemGroup>
 
 </Project>