Remove F# test workaround

[mmitche]

It was discovered that when the .NET SDK enters RTM mode, the F# template tests (ItCanCreateAndBuildTemplatesWithDefaultFramework and ItCanBuildTemplates) start failing because the F# SDK assumes that once the .NET SDK goes non-preview, the implicitly added version of FSharp.Core should also be stable. This is not necessarily true pre-release. This should probably key off of the version actually inserted into the SDK.

Anyways, once we figure out how to resolve this, remove the workaround.

[mmitche]

https://github.com/dotnet/installer/pull/12471

[marcpopMSFT]

@KevinRansom any suggestions on how to make this work automatically rather than having to add and remove the workaround with each stable build release?

[MiYanni]

@mmitche Is this still an issue?

[mmitche]

Don't think so.