Remove creation date from file content

[eduherminio]

If generated files are checked-in into source control and its generation process is automated, changes will always be detected due to the change of that generation time.

Path separation characters have been unified cross-OS to minimize those source-control discrepancies, so it could make sense to also get rid of the creation date.

No extra functionality would be added, since users can already provide a --prefixand a--sufifixand as long as nooutput` is provided, the creation date will be used in the name of the file.