Removed unit test for prerelease version and VSCode temp folder

[Gijsreyn]

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Addresses faulty test in Dotnet DSC resource and support for cross-platform VSCode.

Microsoft Reviewers: Open in CodeFlow

[Gijsreyn]

@ryfu-msft There you go. Small one. I just removed the testcase because we are already validating it with PowerShell.

[ryfu-msft]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[Gijsreyn]

Please run it again.

[ryfu-msft]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).