GraphTraverser: move implementation to cpp file

The public interface of our graph traverser is typically called
once per program invocation, so there is no benefit in optimizing
across the boundaries of that call. Many calls do happen within the
internal functions of the graph traverser; but for that, the benefit
of being in the same compilation unit also happens if everything
is moved to the same cpp file. Therefore, make the graph traverser
a standard library and in this way, clean up our code basis.

0 files changed, 0 insertions, 0 deletions