Remove debug output.

app/swarm.py

@@ -71,8 +71,6 @@ class Swarm:
         '       (name=_name). Because there is no id generator for now, it is
         '       not set, so that the Docker engine assigns a random name.
         '''
-        print(_command)
-        print(_image)
         service = self.docker.services.create(
             _image,
             command=_command,