restore not working on net core projects which have no unconditional package references

[rohit21agrawal]

CLI build system is hitting this when building the following test assets:

https://github.com/dotnet/cli/blob/rel/1.0.0/TestAssets/TestPackages/dotnet-desktop-and-portable/dotnet-desktop-and-portable.csproj

https://github.com/dotnet/cli/blob/rel/1.0.0/TestAssets/TestProjects/DependencyContextFromTool/DependencyContextFromTool.csproj

Note : Doesn't repro in an isolated project, likely the cause is the build process of the dotnet cli repository.

[rrelyea]

Likely 4.0.1 - can you do quick analysis so we can triage.

[emgarten]

Investigating

[emgarten]

I'm not seeing any issues in the CLI after removing this workaround for tests. I'm also unable to repro any problems locally with conditional dependencies.

[emgarten]

Fixed in the CLI by removing the workaround.