Bug 36935: Remove warning if file parsing is successful

Bug 36935: Remove warning if file parsing is successful

This patch removes the logged warning if a file parse is successful.

Test plan:
1) prove t/db_dependent/Koha/BackgroundJob/ImportKBARTFile.t
2) The output will have a logged message - 'EOF - End of data in parsing input stream'
3) Apply patch
4) Repeat step 1
5) The warning will be gone

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>