docs: update a couple of examples that showed Pants output. old Pants output

specifically, we caught these as places that contain the string "BUILD:", and
in a refactor a while back, that string was a symptom of obsolescence.

We fixed most of those in passing, but these remain, https://github.com/pantsbuild/pants/issues/461

Testing Done:
rendered at
* http://pantsbuild.github.io/lahosken-demo/build_files.html#debugging-a-build-file
* http://pantsbuild.github.io/lahosken-demo/publish.html#does-not-provide-an-artifact

Bugs closed: 461

Reviewed at https://rbcommons.com/s/twitter/r/1401/