Fix comment.

Change-Id: I29f0ce94008c5aeea074b5354ec989bbbe53c438
Avoid linting the reference file.

While pylint may choose to load it as part of the run, we don't
really care about the results from it. Its presence is therefore
merely a distraction which provides a false pass result among the
results.

Change-Id: I7010ce182757bc2598380ddc26e201264fd4397d