Use default expiry time for artifacts

Co-authored-by: David Pape <zyzzyxdonta@posteo.de>

Author: eilmiv

gitlab/hermes-ci.yml

@@ -80,7 +80,6 @@
   artifacts:
     paths: [".hermes/", "hermes.log"]
     when: always
-    expire_in: 1 year
 
 # hermes metadata preparation - this job creates a MR that will trigger deposition when merged.
 .hermes_curate: