CpuMath has a bad project reference to ML.Core

[eerhardt]

See #1659 (comment)

We recently made CpuMath depend on ML.Core, but this is broken.

The Microsoft.ML nuget package depends on the Microsoft.ML.CpuMath NuGet package. So having the CpuMath.dll depend on Microsoft.ML.Core is backwards.

See #542 for the reasoning why this was done that way.

[jwood803]

@eerhardt I was looking at this while messing with an additional fix for #1566. Am I correct in thinking that Microsoft.ML.Core should have a NuGet package reference to Microsoft.Ml.CpuMath? Since it's in the same project does it need to reference the nupkgproj?

[Zruty0]

I wonder why don't we simply make it one NuGet?

[eerhardt]

#534 Explains why we didn’t make it one NuGet package