Remove test code in utils

restic_volume_backup/utils.py

@@ -1,12 +1,11 @@
 import docker
-import pprint
 
 from restic_volume_backup.config import Config
 
 
 def list_containers():
+    """Easily mockable container list"""
     client = docker.Client(base_url=Config.docker_base_url)
     all_containers = client.containers()
-    pprint.pprint(all_containers, indent=2)
     client.close()
     return all_containers