Change comments to make Insight Sensiolabs not complains about them
minor #577 Change comments to make Insight Sensiolabs not complains about them (keradus)

This PR was squashed before being merged into the 1.0.x-dev branch (closes #577).

Discussion
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Change comments to make Insight Sensiolabs not complains about them

Change comments to make Insight Sensiolabs not complains about them:
> *Commented code should not be commited*
> Commented out code reduces readability and lowers the code confidence for other developers. If it's common usage for debug, it should not be committed. Using a version control system, such code can be safely removed.

Commits
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74fe0de Change comments to make Insight Sensiolabs not complains about them