Static linking: Understanding FS2009 warnings

Please provide a succinct description of the issue.

**Repro steps**

1. Clone https://github.com/VsVim/VsVim
2. Checkout the branch dev/jaredpar/fs2009
3. cd src\VimCore
4. run `dotnet build`

**Expected behavior**

The build completes cleanly

**Actual behavior**

The build produces several FS2009 warnings

```
Microsoft (R) Build Engine version 17.2.0-preview-22152-03+719247ede for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

Determining projects to restore...
All projects are up-to-date for restore.
FSC : warning FS2009: Ignoring mixed managed/unmanaged assembly 'System.Configuration.ConfigurationManager' during static linking [C:\Users\jaredpar\c
ode\VsVim\Src\VimCore\VimCore.fsproj]
FSC : warning FS2009: Ignoring mixed managed/unmanaged assembly 'System.Security.Permissions' during static linking [C:\Users\jaredpar\code\VsVim\Src\
VimCore\VimCore.fsproj]
VimCore -> C:\Users\jaredpar\code\VsVim\Binaries\Debug\VimCore\net472\Vim.Core.dll
VimCore -> C:\Users\jaredpar\code\VsVim\Binaries\Debug\VimCore\net6.0\Vim.Core.dll
```

This project does link the FSharp runtime into the DLL which is likely the source of the FS2009 warnings. Unfortunately though I can't find any information on what this warning is, how to mitigate it, etc ... Looked in a number of places but coming up empty. Want to try and understand this warning so I can move forward with fixing this correctly vs suppressing and moving on.