Remove unused dev-helper-committer
Remove unused dev-helper-committer

This helper script was never completed, and it doesn't look like there's
much interest in using it.

refs #4757

sevein/archivematica,michal-ruzicka/archivematica,michal-ruzicka/archivematica,michal-ruzicka/archivematica,eckardm/archivematica,artefactual/archivematica,artefactual/archivematica,eckardm/archivematica,eckardm/archivematica,sevein/archivematica,eckardm/archivematica,artefactual/archivematica,sevein/archivematica,michal-ruzicka/archivematica,artefactual/archivematica,sevein/archivematica