Minor cleanup in CoreContext
Minor cleanup in CoreContext

We don't support libstdc anymore, now it's safe to just return `nullptr` instead.

leapmotion/autowiring,leapmotion/autowiring,codemercenary/autowiring,leapmotion/autowiring,codemercenary/autowiring,leapmotion/autowiring,codemercenary/autowiring,leapmotion/autowiring,codemercenary/autowiring,codemercenary/autowiring,leapmotion/autowiring,codemercenary/autowiring