Fix warning FS3548:

[nosami]

Pattern discard is not allowed for union case that takes no data.

I suppose this is a new warning generated by the F# compiler.

[nosami]

@jaredpar I don't suppose you understand where these build errors are coming from? The build was working the last time I tried and there have been no other code changes since!

Seeing a lot of errors like this (both on CI and locally, even without my changes here)

D:\a\VsVim\VsVim\Binaries\obj\VsVim2019\Debug\net472\ConflictingKeyBindingMarginControl.g.cs(58,21): error CS1504: Source file 'ConflictingKeyBindingMarginControl.xaml' could not be opened -- Could not find file. [D:\a\VsVim\VsVim\Src\VsVim2019\VsVim2019_lxa1uue4_wpftmp.csproj]

[nosami]

@jaredpar I don't suppose you understand where these build errors are coming from? The build was working the last time I tried and there have been no other code changes since!

Seeing a lot of errors like this (both on CI and locally, even without my changes here)

D:\a\VsVim\VsVim\Binaries\obj\VsVim2019\Debug\net472\ConflictingKeyBindingMarginControl.g.cs(58,21): error CS1504: Source file 'ConflictingKeyBindingMarginControl.xaml' could not be opened -- Could not find file. [D:\a\VsVim\VsVim\Src\VsVim2019\VsVim2019_lxa1uue4_wpftmp.csproj]

dotnet/sdk#34438 seems relevant here.