clarify what happens when there is no periodname

Author: Barthelemy

Framework/script/RepoCleaner/qcrepocleaner/o2-qc-repo-delete-versions-not-in-periods

@@ -10,7 +10,7 @@ import dryable
 def parse_args():
     """Parse the arguments passed to the script."""
     logging.info("Parsing arguments")
-    parser = argparse.ArgumentParser(description='Remove all the versions in the given path that don\'t match the given list of periodNames ')
+    parser = argparse.ArgumentParser(description='Remove all the versions in the given path that don\'t match the given list of periodNames or has no periodName.')
     parser.add_argument('--url', dest='url', action='store', help='URL of the CCDB, with http[s]://', required=True)
     parser.add_argument('--log-level', dest='log_level', action='store', default="20",
                         help='Log level (CRITICAL->50, ERROR->40, WARNING->30, INFO->20,DEBUG->10)')
@@ -56,9 +56,7 @@ def run(args):
             if "PeriodName" not in v.metadata:
                 ccdb.deleteVersion(v)
                 deleted += 1
-            # logging.debug(f"{v} -> {v.metadata['PeriodName']}")
             elif v.metadata["PeriodName"] not in periods_list:
-                # logging.info(f"Ready to delete {v}")
                 if args.one_by_one:
                     answer = input("  Continue? y/n\n  ")
                     if answer.lower() in ["y", "yes"]: