Hi,

Whilst working on the Reproducible Builds effort [0], we noticed that
golang-github-jung-kurt-gofpdf could not be built reproducibly.

This is because running the tests generated a seemingly duplicate (?)
set of .pdf files separate from the ones under reference/. This meant
that if the tests were skipped, then the binary package would not
include these files — ie. it would differ.

Patch attached that removes these pdfs after running the tests.

 [0] https://reproducible-builds.org/


Regards,