Now that we've shipped the NETStandard support package we will no longer build its content
from `master`.

It will be serviced from the `release/2.0.0` branch and the only netfx builds in `master` will
correspond to package content.


Commit migrated from https://github.com/dotnet/corefx/commit/eade3b36725c8d463a40589ff749af5bb0cab8f4