Robert Muir 1f626d3458 forbidden third-party-signatures -> core-signatures
This is a relic from shading where it was trickier to implement.
Third party signatures are already in e.g. the test list, there
is no reason to separate them out.

Instead, we could have a third party signatures that does
something different... like keep tabs on third party libraries.
2015-12-03 01:45:06 -05:00
..