Remove Microsoft.SourceBuild.Intermediate from prebuilt baseline

[ellahathaway]

Prebuilt detection no longer detects Microsoft.SourceBuild.Intermediates as prebuilts due to dotnet/arcade#13935.

Addresses dotnet/source-build#3010

[ellahathaway]

@tmat @MichaelSimons Could you take a look at the changes in this PR when you get a chance, thanks!

[ellahathaway]

I also wanted to follow up on #1038 (comment) - if you are alright with granting write access then I will add the source-build-internals to the CODEOWNERS file.

[tmat]

Can we delete the file entirely?

[ellahathaway]

Can we delete the file entirely?

After looking at https://github.com/dotnet/arcade/blob/main/src/Microsoft.DotNet.SourceBuild/tasks/src/UsageReport/ValidateUsageAgainstBaseline.cs#L24, it appears that this file can technically be deleted and prebuilt detection would default to comparing against <UsageData />.

That said, IMO the effort involved in reintroducing the file later, should a prebuilt be detected and deemed acceptable, surpasses the advantages of deleting the file now.