Maintenance: Remove outdated CREDITS file.
Maintenance: Remove outdated CREDITS file.

Please see github.com/zammad/zammad for an up-to-date contributor list.

zammad/zammad,zammad/zammad,monotek/zammad,zammad/zammad,monotek/zammad,monotek/zammad,monotek/zammad,zammad/zammad,zammad/zammad,monotek/zammad,zammad/zammad,monotek/zammad