Remove TargetsForTfmSpecificBuildOutput for CPUMath.

Author: JakeRadMSFT

src/Microsoft.ML.CpuMath/Microsoft.ML.CpuMath.csproj

@@ -6,7 +6,6 @@
     <PackageDescription>Microsoft.ML.CpuMath contains optimized math routines for ML.NET.</PackageDescription>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <DefineConstants>$(DefineConstants);CPUMATH_INFRASTRUCTURE</DefineConstants>
-    <TargetsForTfmSpecificBuildOutput>$(TargetsForTfmSpecificBuildOutput);CopyProjectReferencesToPackage</TargetsForTfmSpecificBuildOutput>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="..\Microsoft.ML.Core\Utilities\Contracts.cs" />